陆相页岩储集层岩石力学特性及能量演化特征

doi:10.7657/XJPG20230412

新疆石油地质 ›› 2023, Vol. 44 ›› Issue (4): 472-478.doi: 10.7657/XJPG20230412

陆相页岩储集层岩石力学特性及能量演化特征

甘仁忠^1a(), 熊健²(), 彭妙^1b, 刘向君², 梁利喜², 丁乙²

1.中国石油新疆油田分公司 a.勘探事业部,b.科技管理部，新疆克拉玛依 834000
2.西南石油大学油气藏地质及开发工程国家重点实验室，成都 610500

收稿日期:2022-05-21 修回日期:2022-06-30 出版日期:2023-08-01 发布日期:2023-08-01
通讯作者: 熊健（1986-），男，湖北荆州人，研究员，博士，岩石物理和岩石力学，（Tel）13880093092（E-mail）361184163@qq.com E-mail:ganrzh@petrochina.com.cn;361184163@qq.com
作者简介:甘仁忠(1981-)，男，青海互助人，高级工程师，油气勘探，(Tel)13519912281(E-mail)ganrzh@petrochina.com.cn
基金资助:
国家自然科学基金(42272190);四川省自然科学基金青年科学基金(2022NSFSC1065);中国石油科技创新基金(2023DQ02-0101)

Rock Mechanical Properties and Energy Evolution of Continental Shale Reservoirs

GAN Renzhong^1a(), XIONG Jian²(), PENG Miao^1b, LIU Xiangjun², LIANG Lixi², DING Yi²

1. PetroChina Xinjiang Oilfield Company, a. Exploration Department, b. Science and Technology Management Department, Karamay, Xinjiang 834000, China
2. State Key Laboratory of Reservoir Geology and Development Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China

Received:2022-05-21 Revised:2022-06-30 Online:2023-08-01 Published:2023-08-01

摘要/Abstract

摘要：

以准噶尔盆地吉木萨尔凹陷芦草沟组陆相页岩储集层为研究对象，岩性分别为白云岩、泥质白云岩、白云质泥岩、白云质粉砂岩和粉砂岩，通过室内力学实验，研究了陆相页岩储集层岩石力学特性及能量演化规律。结果表明，陆相页岩储集层不同岩性岩石力学特性存在较明显差异，白云岩、白云质粉砂岩、粉砂岩、泥质白云岩和白云质泥岩的抗压强度分别为112.09 MPa、98.20 MPa、85.98 MPa、81.28 MPa和58.30 MPa;随着围压增大，陆相页岩储集层岩石脆性减弱，延性增强;陆相页岩储集层不同岩性岩样在峰值强度处的能量大小不同，反映不同岩性岩样间存在较强的非均质性，此外，三轴压缩条件下，相同岩性岩石弹性能、耗散能和总能量都大于单轴压缩条件。

关键词: 准噶尔盆地, 吉木萨尔凹陷, 芦草沟组, 陆相页岩, 储集层, 岩石力学特性, 能量演化, 破坏模式

Abstract:

The continental shale reservoirs in the Lucaogou formation of the Jimsar sag in the Junggar basin are lithologically composed of dolomite, argillaceous dolomite, dolomitic mudstone, dolomitic siltstone, and siltstone. The mechanical properties and energy evolution of the continental shale were investigated through laboratory mechanical experiments. The results show that there are significant differences in the rock mechanical properties of different lithologies within the shale reservoir. The compressive strengths of dolomite, dolomitic siltstone, siltstone, argillaceous dolomite and dolomitic mudstone are 112.09 MPa, 98.20 MPa, 85.98 MPa, 81.28 MPa and 58.30 MPa, respectively. With the increase of confining pressure, the brittleness of the rock samples of the continental shale reservoirs decreases and the ductility increases. The rock samples with different lithologies have different energy levels at the peak strength, indicating strong heterogeneity. Furthermore, the total energy, elastic energy and dissipated energy of the rocks with same lithologies under triaxial compression are higher than those under uniaxial compression.

Key words: Junggar basin, Jimsar sag, Lucaogou formation, continental shale, reservoir, rock mechanical property, energy evolution, failure mode

中图分类号:

TE21

甘仁忠, 熊健, 彭妙, 刘向君, 梁利喜, 丁乙. 陆相页岩储集层岩石力学特性及能量演化特征[J]. 新疆石油地质, 2023, 44(4): 472-478.

GAN Renzhong, XIONG Jian, PENG Miao, LIU Xiangjun, LIANG Lixi, DING Yi. Rock Mechanical Properties and Energy Evolution of Continental Shale Reservoirs[J]. Xinjiang Petroleum Geology, 2023, 44(4): 472-478.

图/表 5

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陆相页岩储集层岩石力学特性及能量演化特征

Rock Mechanical Properties and Energy Evolution of Continental Shale Reservoirs

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