川东北YB地区陆相地层超压特征及压力预测

孙琦; 李天义; 周雁; 杨军; 陶泽; 杨甘生; 樊德华

doi:10.11781/sysydz201206611

川东北YB地区陆相地层超压特征及压力预测

doi: 10.11781/sysydz201206611

1.
中国地质大学(北京)深部地质钻探技术国土资源部重点实验室, 北京, 100083
2. 中国石油化工股份有限公司石油勘探开发研究院构造与沉积储层实验室, 北京, 100083
3. 中国地质大学(武汉)构造与油气资源教育部重点实验室, 武汉, 430074

基金项目: 国家自然科学基金重点项目(40739904)、国家自然科学基金面上项目(41072093);国家“十一五”科技重大专项(2011ZX05005-002);中国地质大学(武汉)构造与油气资源教育部重点实验室开放基金(TPR-2011-38)联合资助

详细信息

作者简介:
孙琦(1981- ),男,在读博士,从事钻井新技术、钻井机械方面的研究.E-mail:gotosunqi@gmail.com

中图分类号: TE122.1⁺1
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出版历程
- 收稿日期: 2012-05-10
- 修回日期: 2012-11-06
- 刊出日期: 2012-11-28

Characteristics and prediction of overpressure in continental strata, YB area, northeastern Sichuan Basin

1.
Key Laboratory of Ministry of Land and Resources for Deep Geological Drilling Techniques, China University of Geosciences, Beijing 100083, China
2. Laboratory of Structural and Sedimentological Reservoir Geology, SINOPEC Petroleum Exploration & Production Research Institute, Beijing 100083, China
3. Key Laboratory of Tectonics and Petroleum Resource of Ministry of Education, China University of Geosciences, Wuhan, Hubei 430074, China

摘要

摘要: 川东北YB地区存在多套压力系统,上三叠统—侏罗系陆相地层普遍发育超压及强超压。根据钻杆测试和测井资料,分析了YB地区现今压力特征和3口典型井泥岩超压段的测井响应特征,结果表明,YB地区陆相地层上三叠统—侏罗系压力系数分布在1.3～2.2之间,该区普遍发育超压至强超压,超压的顶界面约在3600～4 000m左右;超压段泥岩测井响应特征显示,声波时差和泥岩密度变化相对较小,泥岩电阻率变化较大,这可能与超压段古埋深与现今埋深差别较大、地层含气饱和度较高有关。采用Eaton公式利用泥岩声波时差换算出的地层压力与实测结果接近。研究认为,利用实测压力校正泥岩声波测井的压力预测模型,有可能取得更好的预测效果。
- 超压 /
- 压力预测 /
- 陆相地层 /
- 上三叠统 /
- 侏罗系 /
- YB地区 /
- 川东北
Abstract: In YB area of the northeastern Sichuan Basin,several sets of pressure systems exist.From the upper Triassic to Jurassic,especially in continental strata,overpressure and strong overpressure are common.Based on DST(drill stem test)and logging data,the present pressure features in YB area and the logging responses of mudstone overpressure sections in 3 typical wells are analyzed.The pressure coefficient of continental strata from the Upper Triassic to Jurassic in YB area ranges from 1.3 to 2.2,indicating overpressure or strong overpressure.The top burial depth of overpressure zones locates at 3 600-4 000 m.The logging responses of mudstone overpressure sections show that the resistance of mudstones changes obviously while DT and mudstone density do not change very much.It might be related to the obvious difference between ancient and present burial depth and the high saturation of gas.The formation pressures converted from mudstone DT by means of Eaton formula are close to field testing results.A pressure prediction model to revise mudstone acoustic logging based on tested pressure has been made and might achieve good prediction results.
- overpressure /
- pressure prediction /
- continental strata /
- Upper Triassic /
- Jurassic /
- YB area /
- northeastern Sichuan Basin

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参考文献(6)

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