渤海湾盆地渤南洼陷沙四段岩相的岩石力学性质差异

李志鹏; 卜丽侠

doi:10.11781/sysydz201902228

渤海湾盆地渤南洼陷沙四段岩相的岩石力学性质差异

doi: 10.11781/sysydz201902228

李志鹏¹,
卜丽侠²

1. 中国石化胜利油田分公司勘探开发研究院, 山东东营 257015;
2. 中国石化胜利油田分公司东辛采油厂, 山东东营 257015

基金项目:

国家科技重大专项"渤海湾盆地济阳坳陷致密油开发示范工程"（2017ZX05072）和山东省胜利油田博士后课题"低渗透油藏相控地应力预测及其应用"（YKB1514）联合资助。

详细信息

作者简介:
李志鹏(1983-),男,博士,副研究员,从事油藏描述方面的研究。E-mail:lizhipeng20020015@126.com。

中图分类号: TE311
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出版历程
- 收稿日期: 2018-04-20
- 修回日期: 2019-02-13
- 刊出日期: 2019-03-28

Difference of lithofacies mechanical properties of the fourth member of Shahejie Formation in the Bonan Subsag, Bohai Bay Basin

LI Zhipeng¹,
BU Lixia²

1. Exploration and Development Research Institute, SINOPEC Shengli Oilfield, Dongying, Shandong 257015, China;
2. Dongxin Oil Exploration Plant, SINOPEC Shengli Oilfield, Dongying, Shandong 257015, China

摘要

摘要: 根据渤海湾盆地渤南洼陷沙四段低渗透油藏取心井资料，研究了其岩相类型，利用不同岩相常规三轴压缩实验分析资料，建立了静态岩石力学参数油藏围压条件的恢复图版，分析了不同岩相静态力学参数及应力-应变关系的差异性。渤南洼陷沙四段低渗透油藏可划分为粗粒砂岩相、细砂岩相、粉砂岩相、泥质砂岩相及碳酸盐质砂岩相5种岩相；同一岩相随着围压的不断增加杨氏模量变大，泊松比增加；随着岩相粒度变粗，存在杨氏模量增加、泊松比减小的整体趋势；粗粒砂岩相的泊松比不遵循整体趋势，较细粒砂岩相大，比粉砂岩相小；岩相粒度变粗，应力-应变关系越趋近线弹性，初始颗粒重排列塑性段变小，高应力塑性段变短。
- 岩相 /
- 力学性质 /
- 低渗透油藏 /
- 沙四段 /
- 始新统 /
- 渤南洼陷 /
- 渤海湾盆地
Abstract: Based on the data of well cores in low permeability reservoirs in the fourth member of Shahejie Formation in the Bonan Oilfield, the rock facies types were studied. Using conventional three axis compression test data of different lithofacies, restored static rock mechanical parameters were established under reservoir confining pressure conditions. The differences of static mechanical parameters and stress-strain relation between lithofacies were analyzed. The low permeability reservoirs in the Bonan Oilfield can be divided into 5 types: coarse grained sandstones, fine sandstones, siltstones, mudstones and carbonate sandstones. In the same rock, with the increasing confining pressure, the Young’s modulus becomes larger, and the Poisson’s ratio increases slightly. With the increase of rock gain size, the Young’s modulus increases and the Poisson’s ratio decreases. However, the Poisson’s ratio of coarse grained sandstones does not follow the overall trend, and is larger than that of fine sandstones and smaller than that of siltstones. As the grain size of rock becomes coarser, the stress-strain relation becomes more linear. And the initial grain rearrangement plastic section and the high stress plastic section become smaller.
- lithofacies /
- mechanical property /
- low permeability reservoir /
- fourth member of Shahejie Formation /
- Eocene /
- Bonan Subsag /
- Bohai Bay Basin

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