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| 塔里木盆地富满地区深层碳酸盐岩储层岩石力学特性实验研究 |
| Experimental study on rock mechanical properties of deep carbonate reservoirs in the Fu Manchu area of Tarim Basin |
| 投稿时间：2024-08-11 修订日期：2024-11-22 |
| DOI： |
| 中文关键词: 岩石力学 塔里木盆地 缝洞型 深层碳酸盐岩储层 |
| 英文关键词:srock mechanics Tarim basin fractured-vuggy deep carbonate reservoirs |
| 基金项目:国家自然科学基金项目(41972138) ；中国石油塔里木油田分公司（671023060003）；中国石油天然气集团有限公司（2023ZZ16YJ02） |
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| 中文摘要: |
| 缝洞型碳酸盐岩储层孔隙度、渗透率、弹性模量等岩石物理力学参数是影响油气开采效果的关键因素。为此，本文以塔里木盆地富满地区奥陶系缝洞型碳酸盐岩储层为研究对象，通过单轴、三轴压缩实验、声发射实验和应力敏感性实验等，系统研究储层岩石力学参数，明确原位条件下储层受力状态。研究结果表明，1）随着围压的增加，岩石的抗压强度和弹性模量逐渐增大，岩石从脆性转变为塑性，表现出应变硬化特性；2）碳酸盐岩储层渗透率随着围压的增大而逐渐降低，且在围压30 MPa 以下变化显著；（3）研究区最大水平主应力为186.14MPa，最小水平主应力为150.82MPa，垂向应力为172.89MPa，表现出走滑断层应力特征。研究结果可为深层缝洞型碳酸盐岩储层高效勘探开发提供技术支撑。 |
| 英文摘要: |
| Rock physico-mechanical parameters, such as porosity, permeability, and elastic modulus of seam-hole carbonate reservoirs, are key factors affecting oil and gas extraction efficiency. Consequently, this paper examines the Ordovician seam-hole type carbonate reservoir in the Fuman area of the Tarim Basin, systematically studying the mechanical parameters of the reservoir rock through uniaxial and triaxial compression experiments, acoustic emission experiments, and stress sensitivity experiments to elucidate the stress state of the reservoir under in-situ conditions. The results indicate that: 1) as the confining pressure increases, the compressive strength and elastic modulus of the rock progressively increase, transitioning the rock from brittle to plastic and exhibiting strain hardening characteristics; 2) the permeability of the carbonate reservoir gradually decreases with increasing confining pressure, with significant changes observed below 30 MPa; 3) the maximum horizontal principal stress in the study area is 186.14 MPa, the minimum horizontal principal stress is 150.82 MPa, and the vertical stress is 172.89 MPa, reflecting the stress characteristics of a strike-slip fault. The results of this study can provide technical support for the efficient exploration and development of deep-seam carbonate reservoirs. |
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