###
地质力学学报:2018,24(4):452-464
本文二维码信息
码上扫一扫!
现今地应力对富有机质页岩断层封闭性的研究——以川东南丁山地区龙马溪组为例
钟城1,2, 秦启荣1,2, 周吉羚3, 胡东风4
(1.“油气藏地质及开发工程”国家重点实验室, 四川 成都 610500;2.西南石油大学地球科学与技术学院, 四川 成都 610500;3.西南油气田分公司川中油气矿, 四川 遂宁 629000;4.中国石化勘探分公司, 四川 成都 610041)
STUDY ON FAULT SEALING OF ORGANIC-RICH SHALE BY PRESENT STRESS: A CASE STUDY OF LONGMAXI FORMATION IN DINGSHAN AREA, SOUTHEAST SICHUAN
ZHONG Cheng1,2, QIN Qirong1,2, ZHOU Jiling3, HU Dongfeng4
(1.State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, Sichuan, China;2.School of Science and Technology, Southwest Petroleum University, Chengdu 610500, Sichuan, China;3.Chuanzhong Oil and Gas Field, Southwest Oil and Gas Field Company, PetroChina, Suining 629000, Sichuan, China;4.Exploration Company, SINOPEC, Chengdu 610041, Sichuan, China)
摘要
图/表
参考文献
相似文献
本文已被:浏览 270次   下载 109
投稿时间:2018-03-12    修订日期:2018-06-11
中文摘要: 断层的封闭性研究对油气藏的保存、评价工作及探索油气的分布规律具有重要的参考价值与指导意义。以川东南丁山地区龙马溪组页岩为例,利用FMI成像测井、震源机制解、现场水力压裂、三轴力学实验、有限元2D-σ方法等技术与方法分别对其现今地应力的方向、大小及岩石力学性质进行了分析,最后对井位附近断层封闭性进行了初步的评价。结果表明:丁山地区龙马溪组页岩现今地应力方向总体处于北东东-南西西(55°±5°)至南东东-北西西(110±5°)范围。DY2井龙马溪组页岩层现今最大主应力约145.0 MPa,断层面叠合正应力约188.4~218.3 MPa,岩石处于塑性变形阶段,破裂模式较为单一,脆性指数约41.6%~49.0%,破裂系数约0.197~0.355,断层封闭性总体较好,含气性与试气效果较好。DY1井龙马溪组页岩层现今最大主应力约52.0 MPa,断层面叠合正应力约75.8~83.1 MPa,岩石处于弹性变形阶段,破裂模式较为复杂,脆性指数约48.5%~55.0%,破裂系数约0.355~0.671,断层封闭性总体较差,含气性与试气效果较差。DY3井和DY4井龙马溪组附近断层封闭性一般。
Abstract:The study of fault sealing has important reference value and guiding significance for the preservation and evaluation of oil and gas reservoirs and exploration of the distribution of oil and gas. Based on the technologies and methods of FMI imaging logging, focal mechanism solution, field hydraulic fracturing, triaxial mechanical experiment, finite element 2D-σ method and so on, the direction, intensity of the present geostress and the rock mechanical properties of the Longmaxi Formation in Dingshan area were analyzed. The sealing property of faults near well location was evaluated preliminarily. The results show that the direction of the present ground stress is generally from NEE-SWW(55°±5°)to SEE-NWW(110°±5°). The maximum principal stress of the Longmaxi Formation is about 145.0 MPa in the Well DY2, and the superimposed normal stress on the fault plane is about 188.4 to 218.3 MPa. The rock is in the plastic deformation stage with a simple fracture mode, generally good fault sealing, gas-bearing properties and test results, the brittleness index about 41.6% to 49.0% and the burst factor about 0.197 to 0.355.The present maximum principal stress of shale formation in the Longmaxi Formation of the Well DY1 is about 52.0 MPa, and the superimposed normal stress of the fault plane is about 75.8 to 83.1 MPa. The rock in the Longmaxi Formation of the Well DY1 is in the elastic deformation stage with a more complex fracture mode, generally bad fault sealing, gas-bearing properties and test results, the Rickman brittleness index about 48.5% to 55.0% and the rock fracture coefficient about 0.355 to 0.671. The fault sealing near shale formation of the Longmaxi Formation in the well DY3 and the well DY4 are generally normal.
文章编号:     中图分类号:P553;P618.12    文献标志码:
基金项目:十三五国家科技重大专项(2017ZX05036003-003);四川省应用基础研究项目(2017JX0176)
引用文本:
钟城,秦启荣,周吉羚,胡东风.现今地应力对富有机质页岩断层封闭性的研究——以川东南丁山地区龙马溪组为例[J].地质力学学报,2018,24(4):452-464DOI:10.12090/j.issn.1006-6616.2018.24.04.047
ZHONG Cheng,QIN Qirong,ZHOU Jiling,HU Dongfeng.STUDY ON FAULT SEALING OF ORGANIC-RICH SHALE BY PRESENT STRESS: A CASE STUDY OF LONGMAXI FORMATION IN DINGSHAN AREA, SOUTHEAST SICHUAN[J].,2018,24(4):452-464DOI:10.12090/j.issn.1006-6616.2018.24.04.047

用微信扫一扫

用微信扫一扫