Reservoir Characteristics and Formation Mechanisms of the fault-fracture carbonate gas reservoir in the Middle-Upper Jurassic of the right bank of Amu Darya River

doi:10.3969/j.issn.1672-7703.2025.01.011

Abstract

Abstract: The oil and gas resources in the Amu Darya Right Bank are abundant. Recently, a large-scale carbonate “ fault-fracture “ gas reservoir was discovered in the eastern region, demonstrating the excellent natural gas accumulation conditions of the carbonate rocks in this area. This study integrates seismic, core, thin section, and drilling log data to investigate the gas accumulation and enrichment patterns in the Upper Jurassic carbonate “ fault-fracture reservoir.” The study suggests that in the research area, under three different levels of faults—controlling faults, transformed faults, and micro-faults—and three types of depositional environments—shoal, mud mound, and intershoal environments—the interaction with associated corrosive fluids has led to the formation of fault-fracture with varying reservoir and permeability characteristics. These fault-fracture reservoirs include six types: shoal body-controlling fault, shoal body-intershoal-controlling fault, shoal body + transformed fault, shoal body + micro-fault, intershoal body + transformed fault, and intershoal body + micro-fault. These six types represent a new type of gas reservoir in the eastern part of the Amu Darya Right Bank. Based on the development geological parameters of several already producing “ fault-fracture “ gas reservoirs, these reservoirs can be further classified into three categories: Type I—large-scale fault-fissure bodies with strong fractures and strong corrosion near controlling faults (structural belts); Type II—local fault-fracture bodies with moderate fractures and moderate corrosion near transformed faults; and Type III—fracture-pore or fracture-type gas reservoirs with weak fractures and no corrosion in micro-faults. Among these, Type I reservoirs, with their significant advantages in reserve scale and stable high production, are the main target for further exploration potential in the region.

Key words: Amu Darya, Upper Jurassic, carbonate, reservoir, fracture, fault, fault-fracture, natural gas reservoir characteristics

CLC Number:

TE122.1

Wang Hongjun, Zhang Peijun, Tang Yuzhe, Wang Siqi, Zhang Liangjie, Guo Chunqiu, Xing Yuzhong, Dong Jianxiong, Wang Qiang. Reservoir Characteristics and Formation Mechanisms of the fault-fracture carbonate gas reservoir in the Middle-Upper Jurassic of the right bank of Amu Darya River[J]. China Petroleum Exploration, 2025, 30(1): 142-155.

References

[1] 窦立荣，李大伟，温志新，等. 全球油气资源评价历程及展望[J]. 石油学报，2022,43(8):1035-1048.
Dou Lirong, Li Dawei, Wen Zhixin, et al . History and outlook of global oil and gas resources evaluation[J]. Acta Petrolei Sinica, 2022,43(8):1035-1048.
[2] 刘亚明，王红军，田作基，等．南美圭亚那盆地不同区带油气成藏差异性分析[J]. 中国石油勘探，2024,29(6):130-143.
Liu Yaming, Wang Hongjun, Tian Zuoji, et al . Analysis of differences in hydrocarbon accumulation in various zones of Guyana Basin, South America[J]. China Petroleum Exploration, 2024,29(6):130-143.
[3] Chen H, Zhang L, Wang H, et al . Formation Conditions and Distribution of Pre-salt Carbonate Reservoirs in Amu Darya Basin[C]//Proceedings of the International Field Exploration and Development Conference 2020. Springer Singapore, 2021:924-937.
[4] 余一欣，殷进垠，郑俊章，等. 阿姆河盆地成藏组合划分与资源潜力评价[J]. 石油勘探与开发，2015,42(6):819-826.
Yu Yixin, Yin Jinyin, Zheng Junzhang, et al . Division and resources evaluation of hydrocarbon plays in the Amu Darya basin, central Asia[J]. Petroleum Exploration and Development, 2015,42(6):819-826.
[5] 温志新，王建君，王兆明，等. 世界深水油气勘探形势分析与思考[J].石油勘探与开发，2023,50(5):924-936.
Wen Zhixin, Wang Jianjun, Wang Zhaoming, et al . Analysis of the world deepwater oil and gas exploration situation[J]. Petroleum Exploration and Development, 2023,50(5):924-936.
[6] 朱日祥，张水昌，万博等. 新特提斯域演化对波斯湾超级含油气盆地形成的影响[J]. 石油勘探与开发，2023,50(1):1-11.
Zhu Rixiang, Zhang Shuichang, Wan Bo, et al . Effects of Neo-Tethyan evolution on the petroleum system of Persian Gulf Superbasin[J]. Petroleum Exploration and Development, 2023, 50(1):1-11.
[7] 穆龙新，计智锋. 中国石油海外油气勘探理论和技术进展与发展方向[J]. 石油勘探与开发，2019,46(6):1027-1036.
Mu Longxin, Ji Zhifeng. Technologcial progress and development directions of PetroChina overseas oil and gas exploration[J]. Petroleum Exploration and Development, 2019,46(6):1027-1036.
[8] 穆龙新，范子菲，许安著. 海外油气田开发特点、模式与对策[J]. 石油勘探与开发，2018,45(4):690-697.
Mu Longxin, Fan Zifei, Xu Anzhu. Development characteristics, models and strategies for overseas oil and gas fields[J]. Petroleum Exploration and Development, 2018,45(4):690-697.
[9] 王红军，马锋，童晓光，等. 全球非常规油气资源评价[J]. 石油勘探与开发，2016,43(6):850-862.
Wang Hongjun, Ma Feng, Tong Xiaoguang, et al . Assessment of global unconventional oil and gas resources[J]. Petroleum Exploration and Development, 2016,43(6):850-862.
[10] 童晓光，张光亚，王兆明，等. 全球油气资源潜力与分布[J]. 石油勘探与开发，2018,45(4):727-736.
Tong Xiaoguang, Zhang Guangya, Wang Zhaoming, et al . Distribution and potential of global oil and gas resources[J]. Petroleum Exploration and Development, 2018,45(4):727-736.
[11] 张良杰，王红军，蒋凌志，等. 阿姆河右岸扬恰地区碳酸盐岩气田富集高产因素[J]. 天然气勘探与开发，2019,42(1):15-20.
Zhang Liangjie, Wang Hongjun, Jiang Lingzhi, et al . Factors influencing accumulation and high yield of carbonate-rock gas fields, Yangui-Chashgui region, Amu Darya Right Bank, Turkmenistan[J]. Natural Gas Exploration and Development, 2019,42(1):15-20.
[12] 李香华，张婷，李洪玺. 阿姆河右岸区块深水低能缓坡礁滩分布综合预测[J]. 天然气工业，2019,39(11):1-9.
Li Xianghua, Zhang Ting, Li Hongxi. Integrated prediction on the distribution of reef beach in the depositional environment of low-energy deepwater slopes in the Amu Darya right bank block[J]. Natural Gas Industry, 2019,39(11):1-9.
[13] ULMISHEK G F. Petroleum geology and resources of the Amu-Darya basin, Turkmenistan, Uzbekistan, Afghanistan, and Iran[M]. Iran: US Department of the Interior, US Geological Survey, 2004
[14] 单云鹏，王红军，张良杰，等. 土库曼斯坦阿姆河右岸卡洛夫—牛津阶储层流体包裹体特征及成藏期[J]. 东北石油大学学报，2020,44(3):14-25.
Shan Yunpeng，Wang Hongjun，Zhang Liangjie，et al . Fluid inclusion characteristics and hydrocarbon accumulation period of Callovian-Oxfordian reservoir on the right bank of Amu Darya，Turkmenistan[J]. Journal of Northeast Petroleum University，2020,44(3):14-25.
[15] 张长宝，罗东坤，魏春光. 中亚阿姆河盆地天然气成藏控制因素[J].石油与天然气地质，2015,36(5):766-773.
Zhang Changbao, Luo Dongkun, Wei Chunguang. Controlling factors of natural gas accumulation in the Amu Darya Basin, Central Asia[J]. Oil & Gas Geology, 2015,36(5):766-773.
[16] Mehrabi H, Yahyaei E, Navidtalab A, et al . Depositional and diagenetic controls on reservoir properties along the shallowmarine carbonates of the Sarvak Formation, Zagros Basin: Petrographic, petrophysical, and geochemical evidence[J]. Sedimentary Geology, 2023:106457.
[17] 王红军，张良杰，陈怀龙，等. 阿姆河右岸盐下侏罗系大中型气田地质特征与分布规律[J]. 中国石油勘探，2020,25(4):52-64.
Wang Hongjun, Zhang Liangjie, Chen Huailong, et al . Geological characteristics and distribution law of sub-salt Jurassic large and medium gas fields in the right bank of the Amu Darya River［J］. China Petroleum Exploration， 2020，25（4）：52-64.
[18] 白振华，张良杰，王红军，等. 阿姆河右岸区块侏罗系盐下碳酸盐岩油气动态成藏过程研究[J]. 海相油气地质，2022,27(4):429-439.
Bai Zhenhua, Zhang Liangjie, Wang Hongjun, et al . Analysis of dynamic hydrocarbon accumulating process of Jurassic presalt carbonate reservoirs in the right bank block of Amu Darya River[J]. Marine Origin Petroleum Geology, 2022,27(4):429-439.
[19] 聂明龙，张波，赵威，等. 阿姆河盆地别什肯特坳陷及邻区中下侏罗统烃源岩地球化学特征与勘探意义[J]. 天然气工业，2023,43(10):47-54.
Nie Minglong, Zhang Bo, Zhao Wei, et al . Geochemical characteristics and exploration significance of Middle–Lower Jurassic source rocks in the Beshkent Depression and adjacent areas of the Amu Darya Basin[J]. Natural Gas Industry, 2023, 43(10):47-54.
[20] 聂明龙，赵星林，程木伟，等. 阿姆河右岸区块卡洛夫—牛津阶礁滩型储集层特征[J]. 新疆石油地质，2016,37(5):1.
Nie Minglong, Zhao Xinglin, Cheng Muwei, et al . Characteristics of reef-flat reservoirs of Callovian-Oxfordian stage in right bank area, Amu-Darya Basin[J]. Xinjiang Petroleum Geology, 2016,37(5):1.
[21] 马智，郭同翠，李昊宸，等. 阿姆河右岸复杂膏盐岩地震响应特征研究[J]. 石油物探，2016,55(1):100-106.
Ma Zhi, Guo Tongcui, Li Haochen, et al . Seismic response characteristics of complex halo-anhydrite in Amu Darya right bank[J]. Geophysical Prospecting for Petroleum, 2016,55(1):100-106.
[22] 何治亮，孙建芳，郭攀红，等. 碳酸盐岩储集层知识库构建方法及其在缝洞型油藏地质建模中的应用[J]. 石油勘探与开发，2021,48(4):710-718.
He Zhiliang, Sun Jianfang, Guo Panhong, et al . Construction of carbonate reservoir knowledge base and its application in fracture-cavity reservoir geological modeling[J]. Petroleum Exploration and Development, 2021,48(4):710-718.
[23] 丁志文，汪如军，陈方方，等. 断溶体油气藏成因、成藏及油气富集规律：以塔里木盆地哈拉哈塘油田塔河南岸地区奥陶系为例[J]. 石油勘探与开发，2020,47(2):286-296.
Ding Zhiwen, Wang Rujun, Chen Fangfang, et al . Origin, hydrocarbon accumulation and oil-gas enrichment of faultkarst carbonate reservoirs: a case study of Ordovician carbonate reservoirs in South Tahe area of Halahatang oilfield, Tarim Basin[J]. Petroleum Exploration and Development, 2020, 47(2):286-296.
[24] 张文彪，段太忠，李蒙，等. 塔河油田托甫台区奥陶系断溶体层级类型及表征方法[J]. 石油勘探与开发，2021,48(2):314-325.
Zhang Wenbiao, Duan Taizhong, Li Meng, et al . Architecture characterization of Ordovician fault-controlled paleokarst carbonate reservoirs in Tuoputai, Tahe oilfield, Tarim Basin, NW China[J]. Petroleum Exploration and Development, 2021, 48(2):314-325.
[25] 闫海军，何东博，贾爱林，等. 川中震旦系灯四段岩溶储集层特征与发育模式[J]. 石油勘探与开发，2022,49(4):704-715.
Yan Haijun, He Dongbo, Jia Ailin, et al . Characteristics and development model of karst reservoirs in the fourth member of Sinian Dengying Formation in central Sichuan Basin, SW China[J]. Petroleum Exploration and Development, 2022,49(4):704-715.
[26] Cheng X, Ding W, Pan L, et al . Geometry and kinematics characteristics of strike-slip fault zone in complex structure area: a case study from the South No. 15 strike-slip fault zone in the Eastern Sichuan Basin, China[J]. Frontiers in Earth Science, 2022,10:922664.
[27] Li F, Jing X, Zou C, et al . Facies analysis of the Callovian–Oxfordian carbonates in the northeastern Amu Darya Basin, southeastern Turkmenistan[J]. Marine and Petroleum Geology, 2017,88:359-380.
[28] Tang Y, Wang H, Zhang L, et al . Seismic lithology and geological implications of pre-salt Jurassic carbonate rocks in the Amu Darya Right Bank[J]. Marine and Petroleum Geology, 2024:106865.
[29] Tang Y, Chai H, Wang H, et al . Seismic geomorphology analysis and petroleum geology significance ofpresalt Jurassic carbonate in the right bank of Amu Darya River[J]. Geoenergy Science and Engineering, 2023,230:212266.
[30] Meisel T, Krahenbuhl U, Nazarov M A. Combined osmium and strontium isotopic study of the Cretaceous-Tertiary boundary at Sumbar, Turkmenistan: A test for an impact vs. a volcanic hypothesis[J]. Geology, 1995,23(4):313-316.
[31] Robert A M M, Letouzey J, Kavoosi M A, et al . Structural evolution of the Kopeh Dagh fold-and-thrust belt (NE Iran) and interactions with the South Caspian Sea Basin and Amu Darya Basin[J]. Marine and Petroleum Geology, 2014,57:68-87.
[32] Brunet M F, Ershov A V, Korotaev M V, et al . Geological evolution of Central Asian Basins and the western Tien Shan Range[J].Geological Society of London Special Publications, 2017,427(1):17.
[33] Shan Y, Wang H, Zhang L, et al . Study on hydrocarbon accumulation periods based on fluid inclusions and diagenetic sequence of the subsalt carbonate reservoirs in the Amu Darya right bank block[J]. Geofluids, 2022,1-19.
[34] Carmeille M, Bourillot R, Brunet M F, et al . Architecture and sedimentary evolution of the southwestern Gissar carbonate platform (Uzbekistan) during the Middle?Late Jurassic[J]. Marine and Petroleum Geology, 2018,97:437-465.
[35] 张良杰，王红军，程木伟，等. 阿姆河右岸东部侏罗系盐下断层发育特征及其对天然气富集影响[J]. 中国石油勘探，2022,27(2):71-83.
Zhang Liangjie, Wang Hongjun, Cheng Muwei, et al . Characteristics of subsalt Jurassic faults and the influence on natural gas enrichment in the eastern part of the right bank of Amu Darya River[J]. China Petroleum Exploration, 2022,27(2): 7-831.
[36] 唐昱哲，柴辉，王红军，等. 中亚阿姆河右岸东部地区侏罗系盐下碳酸盐岩储层特征及预测新方法[J]. 岩性油气藏，2023,35(6):147-158.
Tang Yuzhe, Chai Hui, Wang Hongjun, et al . Characteristics and new prediction methods of Jurassic subsalt carbonate reservoirs in the eastern right bank of Amu Darya，Central Asia[J]. Lithologic Reservoirs，2023,35(6):147-158.
[37] 郑荣才，刘合年，吴蕾，等. 阿姆河盆地卡洛夫阶—牛津阶碳酸盐岩储层地球化学特征和成岩流体分析[J]. 岩石学报，2012,28(3):961-970.
Zheng Rongcai, Liu Henian, Wu Lei, et al . Geochemical characteristics and diagenetic fluid of the Callovian-Oxfordian carbonate reservoirs in Amu Darya basin[J]. Acta Petrologica Sinica, 2012,28(3):961-970.
[38] Palermo D, Aigner T, Nardon S, et al . Three-dimensional facies modeling of carbonate sand bodies: Outcrop analog study in an epicontinental basin (Triassic, southwest Germany)[J]. AAPG bulletin, 2010,94(4):475-512.
[39] Palermo D, Aigner T, Seyfang B, et al . Reservoir properties and petrophysical modelling of carbonate sand bodies: outcrop analogue study in an epicontinental basin (Triassic, Germany)[J]. Geological Society, London, Special Publications, 2012,370(1): 111-138.
[40] Burchette T P, Wright V P, Faulkner T J. Oolitic sandbody depositional models and geometries, Mississippian of southwest Britain: implications for petroleum exploration in carbonate ramp settings[J]. Sedimentary Geology, 1990,68(1-2):87-115.
[41] Liu H, Tang Y, Tan X, et al . Paleogeomorphological reconstruction and geological implications of the weathered-crust karst on the top of the middle Triassic Leikoupo formation in the Longgang area, Sichuan Basin, China[J]. Energy Exploration & Exploitation, 2018,36(4):727-742.
[42] Tan L, Liu H, Tang Q, et al . Application of seismic geomorphology to carbonate rocks: A case study of the Cambrian Longwangmiao Formation in the Gaoshiti-Moxi area, Sichuan Basin, China[J]. Marine and Petroleum Geology, 2021,126:104919.
[43] 谭磊，刘宏，陈康，等. 川中高磨地区震旦系灯影组三, 四段层序沉积与储集层分布[J]. 石油勘探与开发，2022:871-883.
Tan Lei, Liu Hong, Chen Kang, et al . Sequence sedimentary evolution and reservoir distribution in the third and fourth members of Sinian Dengying Formation, Gaomo area, Sichuan Basin, SW China[J]. Petroleum Exploration and Development, 2022:871-883.
[44] 杨威，魏国齐，武赛军，等. 四川盆地区域不整合特征及其对油气成藏的控制作用[J]. 石油勘探与开发，2023,49(5):504-515.
Yang Wei, Wei Guoqi, Wu Saijun, et al . Regional unconformities and their controls on hydrocarbon accumulation in Sichuan Basin, SW China[J]. Petroleum Exploration and Development, 2023,49(5):504-515.
[45] 张三，金强，胡明毅，等. 塔河地区奥陶系不同地貌岩溶带结构组合差异与油气富集[J]. 石油勘探与开发，2021,48(5):962-973.
Zhang San, Jin Qiang, Hu Mingyi, et al . Differential structure of Ordovician karst zone and hydrocarbon enrichment in paleogeomorphic units in Tahe area, Tarim Basin, NW China[J]. Petroleum Exploration and Development, 2021,48(5):962-973.
[46] Shan Y, Chai H, Wang H, et al . Origin and characteristics of the crude oils and condensates in the Callovian-Oxfordian carbonate reservoirs of the Amu Darya right bank block, Turkmenistan[J]. Lithosphere, 2022(1):1-27.
[47] 范毅，夏茂龙，贾松，等. 四川盆地中部蓬莱气区灯四段丘滩体优质储层特征及主控因素[J]. 特种油气藏，2024,31(5):1-10.
Fan Yi, Xia Maolong, Jia Song, et al . Characteristics and main controlling factors of high-quality reservoir in the mound-beach body of the Fourth Member of Dengying Formation in gas zones of the central Sichuan Basin[J]. Special Oil & Gas Reservoirs, 2024,31(5):1-10.
[48] 陶夏妍，黄天俊，张艺华，等. 四川盆地东北部三叠系飞仙关组迁移型鲕滩层序地层分析及相控储层预测[J]. 特种油气藏，2023,30(6):62-71.
Tao Xiayan, Huang Tianjun, Zhang yihua, et al .Sequence stratigraphical analysis and facies-controlled reservoir prediction of migratory oolitic beach in Triassic Feixianguan Formation, northeastern Sichuan Basin[J]. Special Oil & Gas Reservoirs, 2023,30(6):62-71.
[49] 陈元千. 预测油气资源Pareto 模型的建立、修正与应用：兼评我国现行的油田储量规模排序法[J]. 中国石油勘探，2008(4):43-49,2.
Chen Yuanqian. Establishment, modification and application of Pareto model for forecasting oil and gas resources：review of existing rank order method of accumulation size in oilfields[J]. China Petroleum Exploration，2008(4):43-49,2.
[50] 郭秋麟，陈宁生，柳庄小雪，等. 盆地模拟关键技术之油气运聚模拟技术进展[J]. 石油实验地质，2020,42(5):846-857.
Guo Qiulin, Chen Ningsheng, Liu Zhuangxiaoxue, et al . Advance of basin modeling key techniques: hydrocarbon migration and accumulation simulation[J]. Petroleum Geology & Experiment, 2020,42(5):846-857.
[51] 郭秋麟，陈宁生，谢红兵，等. 基于有限体积法的三维油气运聚模拟技术[J]. 石油勘探与开发，2015,42(6):817-825.
Guo Qiulin, Chen Ningsheng, Xie Hongbing, et al . Threedimensional hydrocarbon migration and accumulation modeling based on finite volume method[J]. Petroleum Exploration and Development, 2015,42(6):817-825.