Karst paleogeomorphology and reservoir distribution pattern of Ordovician in the southeastern Ordos Basin

doi:10.3969/j.issn.1672-7703.2020.03.013

Abstract

Abstract: In order to study the development characteristics of karst paleogeomorphology and the spatial distribution pattern of reservoir in the southeastern Ordos Basin, based on data from cores, well logging, outcrop, seismic data, and laboratory testing, several methods, such as paleo-geological mapping, residual thickness, and impression and geophysical attributes, are used for comprehensive analysis. Results show that the karst paleogeomorphology of the Ordovician in the southeastern Ordos Basin is as follows: “The west and the southwest areas are highlands, where saddles and platforms are developed. Water funnels into sags between platforms and flows eastward along the slope. Mounds and platforms are formed in the slope, between which there are several grooves. Water in the grooves finally funnels into the basin. There are sags and mounds in the basin.” The study shows that, in residual mounds, karst highlands, and transitional parts of karst platforms in karst slopes, as well as in the slope zones of the up-dip parts of paleo grooves, karstification is strong and dissolution pores are well developed. Due to the influence of later diagenesis such as compaction, cementation, metasomatism and dissolution, primary pores are rarely preserved. The reservoir space is mainly composed of nanometer-scale intercrystalline pores, followed by micro-scale dissolution pores. According to the distribution patterns of karst paleogeomorphology and paleo groove networks, and the spatial distribution characteristics of reservoir space, the slope zones and residual mound areas controlled by paleo grooves and the geomorphic transition belts in karst highlands are the key areas for hydrocarbon exploration and development.

Key words: carbonate rock, karst paleogeomorphology, reservoir study, Majiagou Formation, southeastern Ordos Basin

CLC Number:

Cao Hongxia, Wu Haiyan, Ren Xingmin, Wu Yu, Liang Quansheng, Tong Minbo. Karst paleogeomorphology and reservoir distribution pattern of Ordovician in the southeastern Ordos Basin[J]. China Petroleum Exploration, 2020, 25(3): 146-155.

References

[1] 白国平. 世界碳酸盐岩大油气田分布特征[J]. 古地理学报，2006， 8(2):241-250. Bai Guoping. Distribution patterns of giant carbonate fields in the world[J]. Journal of Palaeogeography, 2006,8(2):241-250.
[2] 郭彦如，赵振宇，徐旺林，史晓颖，高建荣，包洪平，等. 鄂尔多斯盆地奥陶系层序地层格架[J]. 沉积学报，2014,32(1):44-60. Guo Yanru, Zhao Zhenyu, Xu Wanglin, Shi Xiaoying, Gao Jianrong, Bao Hongping, et al . Sequence stratigraphy of the Ordovician System in the Ordos Basin[J]. Acta Sedimentologica Sinica，2014,32(1):44-60.
[3] 曹红霞，王念喜，强娟，吴海燕，尚婷. 鄂尔多斯盆地东南部下古生界碳酸盐岩天然气成藏条件[J]. 西安科技大学学报，2014,34(6): 713-718. Cao Hongxia, Wang Nianxi, Qiang Juan, Wu Haiyan, Shang Ting. Natural gas reservoir forming conditions about Lower Paleozoic carbonate[J]. Journal of Xi’an University of Science and Technology, 2014,34(6):713-718.
[4] 侯方浩，方少仙，董兆雄，赵敬松，卢蜀秀，吴诒，等. 鄂尔多斯盆地中奥陶统马家沟组沉积环境与岩相发育特征[J]. 沉积学报，2003, 21(1):106-112. Hou Fanghao, Fang Shaoxian, Dong Zhaoxiong, Zhao Jingsong, Lu Shuxiu, Wu Yi, et al . The developmental characters of sedimentary environments and lithofacies of Middle Ordovician Majiagou Formation in Ordos Basin[J]. Acta Sedimentologica Sinica, 2003,21(1):106-112.
[5] 史基安，邵毅，张顺存，付翠琴，白海峰，马占龙，等. 鄂尔多斯盆地东部地区奥陶系马家沟组沉积环境与岩相古地理研究[J]. 天然气地球科学，2009,20(3):316-324. Shi Ji’an, Shao Yi, Zhang Shuncun, Fu Cuiqin, Bai Haifeng, Ma Zhanlong, et al . Lithofacies paleogeography and sedimentary environment in Ordovician Majiagou Formation eastern Ordos Basin[J]. Natural Gas Geoscience, 2009,20(3): 316-324.
[6] 曹红霞，吴海燕，尚婷，王念喜，乔向阳，冯悦. 鄂尔多斯盆地东南部马家沟组碳酸盐岩碳氧同位素特征及意义[J]. 西北大学学报：自然科学版，2018,48(4):578-586. Cao Hongxia, Wu Haiyan, Shang Ting, Wang Nianxi, Qiao Xiangyang, Feng Yue. Characteristics of carbon and oxygen isotopes of carbonate rocks in Majiagou Formation and their implication, southeastern Ordos Basin[J]. Journal of Northwest University: Natural Science Edition，2018,48(4):578-586.
[7] 沈扬，吴兴宁，王少依，吴东旭，丁振纯，于洲. 鄂尔多斯盆地东部奥陶系风化壳岩溶储层孔隙充填特征[J]. 海相油气地质，2018, 23(3):21-31. Shen Yang, Wu Xingning, Wang Shaoyi, Wu Dongxu, Ding Zhenchun, Yu Zhou. Pore-filling characteristics of Ordovician karst reservoirs in eastern Ordos Basin[J]. Marine Origin Petroleum Geology, 2018,23(3):21-31.
[8] 魏新善，任军峰，赵俊兴，张道锋，罗顺社，魏柳斌，等. 鄂尔多斯盆地东部奥陶系风化壳古地貌特征嬗变及地质意义[J]. 石油学报， 2017,38(9):999-1009. Wei Xinshan, Ren Junfeng, Zhao Junxing, Zhang Daofeng, Luo Shunshe, Wei Liubin, et al . Paleo-geomorphologic characteristic evolution and geological significance of the Ordovician weathering crust in eastern Ordos Basin[J]. Acta Petrolei Sinica，2017,38(9)：999-1009.
[9] 代金友，何顺利. 鄂尔多斯盆地中部气田奥陶系古地貌研究[J]. 石油学报．2005,26(3):37-39,43. Dai Jinyou，He Shunli. Ordovician paleokarst landform of central gas field in Ordos Basin[J]. Acta Petrolei Sinica，2005, 26(3):37-39,43.
[10] 杨华，黄道军，郑聪斌. 鄂尔多斯盆地奥陶系岩溶古地貌气藏特征及勘探进展[J]. 中国石油勘探，2006,11(3):1-5,12. Yang Hua, Huang Daojun, Zheng Congbin. Characteristics and exploration progress of Ordovician Karst paleogeomorphic gas reservoir in Ordos Basin[J]. China Petroleum Exploration， 2006,11(3):1-5,12.
[11] 常少英，邓兴梁，常中英，曹鹏，曹小初. 岩溶洞穴型储层发育期次识别技术及应用[J]. 中国石油勘探，2018,23(3):109-114. Chang Shaoying, Deng Xingliang, Chang Zhongying, Cao Peng, Cao Xiaochu. The identification technology for developmental periods of karst cave reservoirs and its application[J]. China Petroleum Exploration, 2018,23(3):109-114.
[12] 卞从胜，汪泽成，江青春，池英柳，徐兆辉. 四川盆地川西地区雷口坡组岩溶储层特征与分布[J]. 中国石油勘探，2019,24(1):82-93. Bian Congsheng, Wang Zecheng, Jiang Qingchun, Chi Yingliu, Xu Zhaohui. Characteristics and distribution of karst reservoirs in the Leikoupo Formation, western Sichuan Basin[J]. China Petroleum Exploration, 2019,24(1):82-93.
[13] 黎荣，胡明毅，潘仁芳，胡忠贵. 川中地区中二叠统断溶体发育特征及形成机制[J]. 中国石油勘探，2019,24(1):105-114. Li Rong, Hu Mingyi, Pan Renfang, Hu Zhonggui. Development characteristics and forming mechanism of Middle Permian faultkarst carbonate reservoirs in the central Sichuan Basin[J]. China Petroleum Exploration, 2019,24(1):105-114.
[14] 漆立新. 塔里木盆地顺北超深断溶体油藏特征与启示[J]. 中国石油勘探，2020,25(1):102-111. Qi Lixin. The characteristics and enlightenment of Ultradeep carbonate reservoir controlled by fault-zone-architecture related dissolution in Shunbei, Tarim Basin[J]. China Petroleum Exploration, 2020,25(1):102-111.
[15] 付金华，范立勇，刘新社，胡新友，李继宏，季海锟. 鄂尔多斯盆地天然气勘探新进展、前景展望和对策措施[J]. 中国石油勘探，2019, 24(4):418-430. Fu Jinhua, Fan Liyong, Liu Xinshe, Hu Xinyou, Li Jihong, Ji Haikun. New progresses, prospects and counter measures of natural gas exploration in the Ordos Basin[J]. China Petroleum Exploration, 2019,24(4):418-430.
[16] 李道隧，张宗林，徐晓蓉. 鄂尔多斯盆地中部古地貌与构造对气藏的控制作用[J]. 石油勘探与开发，1994,21(3):9-15. Li Daosui, Zhang Zonglin, Xu Xiaorong. The control of paleogeomorphology and structure on gas reservoir in the middle of Ordos Basin[J].Petroleun Exploration and Development, 1994,21(3):9-15.
[17] 何江，沈昭国，方少仙，侯方浩，傅锁堂，徐黎明，等. 鄂尔多斯盆地中部前石炭纪岩溶古地貌恢复[J]. 海相油气地质，2007,12(2): 8-16. He Jiang, Shen Zhaoguo, Fang Shaoxian, Hou Fanghao, Fu Suotang, Xu Liming, et al . Restoration of Pre-Carboniferous Palaeokarst Landform in central Ordos Basin[J]. Marine Origin Petroleum Geology, 2007,12(2):8-16.
[18] 乔博，刘海锋，何鎏，蔡明歌，张芳，袁继明. 鄂尔多斯盆地靖边气田的古地貌定量恢复新方法[J]. 天然气勘探与开发，2018,41(4): 32-37. Qiao Bo, Liu Haifeng，He Liu，Cai Mingge，Zhang Fang， Yuan Jiming. A new method to quantitatively rebuild palaeogeomorphology and its application to Jingbian gasfield Ordos Basin[J]. Natural Gas Exploration and Development， 2018, 41(4):32-37.
[19] 韩敏强，蒲仁海，刘海娟，郭向东，刘宝平. 鄂尔多斯盆地延长探区奥陶纪末古地貌恢复与储层预测[J]. 石油与天然气地质，2011, 32(54):760-767. Han Minqiang, Pu Renhai，Liu Haijuan, Guo Xiangdong, L i u B a o p i n g . R e c o n s t r u c t i o n o f t h e l a t e O r d o v i c i a n palaeogeomorphology and reservoir prediction in Yanchang exploration area，the Ordos Basin[J]. Oil & Gas Geology, 2011,32(54):760-767.
[20] 王高平，王震亮，赵雪娇，李彦婧，王念喜，任来义，等. 鄂尔多斯盆地延安地区奥陶系风化壳古地貌恢复[J]. 沉积学报，2013,31(4): 563-570. Wang Gaoping, Wang Zhenliang, Zhao Xuejiao, Li Yanjing, Wang Nianxi, Ren Laiyi, et al . Palaeogeomorphology restoring of Ordovician weathering crust in Yan’an area，Ordos Basin[J]. Acta Sedimentologica Sinica, 2013,31(4):563-570.
[21] 王建民，王佳媛，沙建怀，郭德运，高海仁，聂武军，等. 鄂尔多斯盆地东部奥陶系风化壳岩溶古地貌特征及综合地质模型[J]. 吉林大学学报：地球科学版，2014;44(2):409-418. Wang Jianmin, Wang Jiayuan, Sha Jianhuai, Guo Deyun, Gao Hairen, Nie Wujun, et al . Karst paleogeomorphology and comprehensive geological model of the Ordovician weathering crust in the eastern Ordos Basin[J].Journal of Jilin University: Earth Science Edition, 2014,44(2):409-418.
[22] 吴海燕，曹红霞，于珺，孙建博，乔向阳，强娟，等. 鄂尔多斯盆地吴起—甘泉地区奥陶系古地貌恢复研究[J]. 非常规油气，2016, 3(4):40-47. Wu Haiyan, Cao Hongxia, Yu Jun, Sun Jianbo, Qiao Xiangyang, Qiang Juan, et al . Study on the Palaeogeomorphology restoration of Ordovician in Wuqi-Ganquan area of Ordos Basin[J]. Unconventional Oil & Gas，2016,3(4):40-47.
[23] 王香增. 陕西延长石油( 集团) 有限责任公司油气勘探开发进展与展望[J]. 中国石油勘探，2018,23(1):36-43. Wang Xiangzeng. Advances and prospects in oil and gas exploration and development of Shaanxi Yanchang Petroleum (Group) Co.,Ltd[J]. China Petroleum Exploration, 2018, 23(1):36-43.
[24] 冯增昭，鲍志东，康祺发，张永生，谭健，李振亚，等. 鄂尔多斯早古生代古构造[J]. 古地理学报，1999,1(2):84-91. Feng Zengzhao, Bao Zhidong, Kang Qifa, Zhang Yongsheng, Tan Jian, Li Zhenya, et al . Palaeotectonics of Ordos in the Early Palaeozoic[J]. Journal of Palaeogeography, 1999,1(2): 84-91.
[25] 赵文智，沈安江，胡安平，周进高，倪新锋. 塔里木、四川和鄂尔多斯盆地海相碳酸盐岩规模储层发育地质背景初探[J]. 岩石学报， 2015,31(11):3495-3508. Zhao Wenzhi, Shen Anjiang, Hu Anping, Zhou Jingao, Ni Xinfeng. A Discussion on the geological background of marine carbonate reservoirs development in Tarim，Sichuan and Ordos Basin，China[J]. Acta Petrologica Sinica, 2015,31(11): 3495-3508.
[26] 汪泽成，姜华，王铜山，鲁卫华，谷志东，徐安娜，等. 四川盆地桐湾期古地貌特征及成藏意义[J]. 石油勘探与开发，2014,41(3): 305-312. Wang Zecheng, Jiang Hua, Wang Tongshan, Lu Weihua, Gu Zhidong, Xu Anna, et al . Paleo-geomorphology formed during Tongwan tectonization in Sichuan Basin and its significance for hydrocarbon accumulation[J]. Petroleun Exploration and Development, 2014,41(3):305-312.
[27] 陈学时，易万霞，卢文忠. 中国油气田古岩溶与油气储层[J]. 海相油气地质，2002,7(4):13-25. Chen Xueshi, Yi Wanxia, Lu Wenzhong. Paleokarst and oil and gas reservoirs in oil and gas fields of China[J]. Marine Origin Petroleum Geology，2002,7(4):13-25.
[28] 张云峰，谭飞，屈海洲，钟治奇，刘勇，罗新生，等. 岩溶残丘精细刻画及控储特征分析——以塔里木盆地轮古地区奥陶系风化壳岩溶储集层为例[J]. 石油勘探与开发，2017,44(5):716-726. Zhang Yunfeng, Tan Fei, Qu Haizhou, Zhong Zhiqi, Liu Yong, Luo Xinsheng, et al . Karst monadnock fine characterization and reservoir control analysis: a case from Ordovician weathering paleokarst reservoirs in Lungu area, Tarim Basin, NW China[J]. Petroleum Exploration and Development, 2017,44(5):716-726.
[29] 朱茂，沈安江，曾洪流，李文正，谷明峰，田瀚. 古地貌恢复在岩溶风化壳储层研究中的应用——以川中磨溪地区灯影组四段为例[J]. 海相油气地质，2018,23(4):87-95. Zhu Mao, Shen Anjiang, Zeng Hongliu, Li Wenzheng, Gu Mingfeng, Tian Han. The application of paleogeomorphy restoration to the study of karst weathering crust reservoir：a case from the fourth member of Dengying Formation in Moxi area， Sichuan Basin[J]. Marine Origin Petroleum Geology, 2018,23(4):87-95.
[30] 洪余刚，陈景山，代宗仰，钱津. 古地貌恢复在风化壳岩溶型储层研究中的应用——以川中—川南过渡带奥陶系为例[J]. 大庆石油地质与开发，2007,26(1):1-5. Hong Yugang, Chen Jingshan, Dai Zongyang, Qian Jin. The application of ancient geomorphy recovery to the study on the palaeoweathering crust-type karst reservoir[J]. Petroleum Geology & Oilfield Development in Daqing, 2007,26(1):1-5.
[31] 朱正平，罗文军，潘仁芳，翁雪波，金吉能. 川中高石梯—磨溪地区灯四段古地貌恢复及其对储层的控制作用[J]. 中国石油勘探，2019, 24(6):730-738. Zhu Zhengping, Luo Wenjun, Pan Renfang, Weng Xuebo, Jin Jineng. The paleogeomorphology restoration of Sinian Deng 4 Member and its control on reservoir formation in the Gaoshiti- Moxi area in central Sichuan Basin[J]. China Petroleum Exploration, 2019,24(6):730-738.
[32] 韦红，赵海峰，唐何兵，郭诚. 渤海盆地潜山下古生界岩溶古地貌特征分析——以W 油气田为例[J]. 非常规油气，2016,3(6):31-35. Wei Hong, Zhao Haifeng, Tang Hebing, Guo Cheng. Analysis of ancient geomorphological karst features in buried hill Lower Paleozoic Bohai Basin-taken W oil and gas field as an example[J]. Unconventional Oil & Gas, 2016,3(6):31-35.
[33] 高飞. 利用地震正演及属性预测碳酸盐古沟槽、裂缝和孔溶洞—— 以鄂尔多斯盆地甘泉地区马家沟组为例[J]. 非常规油气，2019,6(4): 25-32. Gao Fei. Prediction of carbonate erosion flutes, fracture and cavity by seismic forward modeling and attributes：a case study of Majiagou Formation in Ganquan area of Ordos Basin[J]. Unconventional Oil & Gas, 2019,6(4):25-32.
[34] 何自新，黄道军，郑聪斌. 鄂尔多斯盆地奥陶系古地貌、古沟槽模式的修正及其地质意义[J]. 海相油气地质，2006,11(2):25-28. He Zixin，Huang Daojun，Zheng Congbin. Modification and geology implication of Ordovician paleogeomorphology and paleogeosyncline distribution models in Ordos Basin[J]. Marine Origin Petroleum Geology, 2006,11(2):25-28.
[35] 何自新，郑聪斌，陈安宁，王飞雁. 长庆气田奥陶系古沟槽展布及其对气藏的控制[J]. 石油学报，2001,22(4):35-38. He Zixin, Zheng Congbin, Chen Anning, Wang Feiyan. Distribution of Ordovician paleogrooves in Changqing gas field and its control on gas reservoirs[J]. Acta Petrolei Sinica，2001, 22(4):35-38.
[36] 盛军，徐立，王奇，阳成，丁晓军，刘燕妮. 鄂尔多斯盆地苏里格气田致密砂岩储层孔隙类型及其渗流特征[J]. 地质论评，2018,64(3): 764-775. Sheng Jun, Xu Li, Wang Qi, Yang Cheng, Ding Xiaojun, Liu Yanni. The seepage characteristics of different pore types of tight sandstone gas reservoir-taking the southeast area of Sulige gas field，Ordos Basin as an example[J]. Geological Review, 2018,64(3):764-775.
[37] 郎东江，尚根华，吕成远，丁绍卿，孙爱军，尚绪岚. 碳酸盐岩储层核磁共振分析方法的实验及应用——以塔河油田为例[J]. 石油与天然气地质，2009,30(3):363-369. Lang Dongjiang, Shang Genhua, Lv Chengyuan, Ding Shaoqing, Sun Aijun, Shang Xulan. Experiment and application of NMR in carbonate reservoir analysis：an example from Tahe oilfield[J]. Oil & Gas Geology, 2009,30(3):363-369. [38] 李军，张超谟，唐小梅，李令喜. 核磁共振资料在碳酸盐岩储层评价中的应用[J]. 江汉石油学院学报，2004,26(1):48-50. Li Jun，Zhang Chaomo，Tang Xiaomei，Li Lingxi. Application of NMR data in carbonate reservoir evaluation[J]. Journal of Jianghan Petroleum Institute, 2004,26(1):48-50. [39] 刘洪军，贾亚妮，李振宏，郑聪斌. 岩溶盆地中微隆起带的存在及意义——以鄂尔多斯盆地奥陶纪岩溶古地貌为例[J]. 天然气地球科学， 2006,17(4):490-493. Liu Hongjun, Jia Yani, Li Zhenhong, Zheng Congbin. Existence and significance of microumbones in karst basin： sample from Ordovician karstic paleogeomorphy in Ordos Basin[J]. Natural Gas Geoscience, 2006,17(4):490-493.