中国石油勘探 ›› 2015, Vol. 20 ›› Issue (3): 30-37.
甯 濛1, 刘 殊2, 龚文平1
出版日期:
2015-05-15
发布日期:
2015-05-22
基金资助:
NingMeng1,LiuShu2,GongWenping1
Online:
2015-05-15
Published:
2015-05-22
Supported by:
摘要: 川西坳陷中三叠统雷口坡组顶部发育古风化壳型储层,近期PZ1井在该风化壳层再次获得高产工业气流,显示雷口坡组具有较大油气潜力,但TS1井的失利又显示了气藏的复杂性。川西坳陷雷口坡组顶部雷四上亚段具溶孔的颗粒白云岩是主要储层,优质储层以白云岩坪相为基础,后期发生白云岩化成岩改造。但由于断层及膏岩夹层的干扰,难以根据地震反射结构预测储层。研究发现,川西坳陷雷口坡组顶部表现出独特的断层相特征:坳陷内发育两个弧形小断层带,表现为强断裂变形白云岩相;断层带后方为断层不发育的完整背斜,表现为弱断裂变形白云岩相;坳陷东坡为揉皱膏岩相。利用这一特殊的断层相特征,依据地质力学原理,预测两弧形小断层带为刚性、单层厚度较薄的地层,为白云岩坪边缘相带,储层厚度较薄但裂缝发育;断层带后方完整地块为刚性、单层厚度较大的地层,为白云岩坪中心相带,储层厚度大;小断层带东侧的揉皱带为膏岩发育区。
中图分类号:
甯濛, 刘殊, 龚文平. 川西坳陷三叠系雷口坡组顶部白云岩储层分布预测[J]. 中国石油勘探, 2015, 20(3): 30-37.
Ning Meng, Liu Shu, Gong Wenping. Prediction of Dolomite Reservoir Distribution on Top of Triassic Leikoupo Formation in Chuanxi Depression[J]. China Petroleum Exploration, 2015, 20(3): 30-37.
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