【作者】 刘高波；

【导师】 冯文光；

【作者基本信息】 成都理工大学 ， 油气田开发， 2007， 博士

【摘要】 在油气田的勘探开发中，地应力的相关知识理论已被运用到各个方面；然而，地应力在某些方面的应用研究还处在起步和探索阶段。本文以磨溪嘉二气藏为例，首次系统地将地应力用于碳酸盐岩气藏的产能评价，详细的讨论了地应力和产能的关系。磨溪气田嘉二气藏是一个具气水过渡带特征的异常高压的低渗透碳酸盐岩气藏，气水关系复杂，气井产能差异大。本文通过对常规测井资料的最优化解释和多元气水识别计算出孔隙度，含气饱和度；然后利用VC++自行编制软件对该区的地应力进行了计算。在上述工作的基础上，计算出各种反映气藏产能的各种指标，并将其在平面上二维展布；然后将这些指标的二维展布和该气藏实际生产动态相比较，发现地应力×单储系数能较好的反映气藏的产能。论文最后讨论了地应力对气藏产能的控制作用。通过文献、实验、软件开发、常规测井、成像测井、压裂等现场资料的解释和研究相结合，论文取得了如下主要进展：(1)在岩石力学参数的计算方面，本文在总结前人的经验公式的基础上，通过实验，得出了一个新的关于抗压强度的公式，该公式综合考虑了岩石密度、波速及泥质含量的影响，其计算结果与实测结果非常接近。(2)在利用常规测井对滲透率的解释上，过去更多的是用孔隙度来拟合，拟合效果并不是很理想，特别是对该区低渗透碳酸盐储层，拟合效果很差；论文首次用孔隙度、电阻率、泥质含量对工区的渗透率进行了多元拟合，提高了测井曲线解释渗透率的精度。(3)论文首次利用常规测井分析地应力的空间分布，并结合单储系数和地应力对储层产能的空间分布进行综合评价，这样对储层的认识和理解更全面，更客观。(4)论文首次将常规测井的地应力解释计算与气田开发产能结合起来，分析了地应力与产能及微裂缝发育程度三者之间的关系；详细地讨论了地应力对低渗透碳酸盐岩气藏产能控制程度的强弱。更多还原

【Abstract】 Theory about ground stress has been applying to exploratory development, however, application of ground stress is in start stage yet in some aspect. This paper firstly apply ground stress to off-take potential estimate and discuss the relation between ground stress and off-take potential in detail, taking JiaEr gas reservoir in moxi field as an example.JiaEr gas reservoir in Moxi field is a carbonatite gas reservoir with characteristic of surpressure, low penetrability. This gas reservoir have complex relation of gas/water and a great difference of gas well off-take potential. This paper caculated the porosity and gas saturation by optimization well logging interpretation and multianalysis gas/water recognition with conventional well logging data, and then, caculated ground stress with software developed by author. based on above work, all kind of index have be caculated, and then distribute the index on the plane of develop zones. And then ground stress multiplied by unit reservoir factor reflected gas reservoir actual off-take potential was discovered by comparing the index with reservoir actual production of gas and water. At last in the paper, the author discussed the control role of ground stress to gas reservoir off-take potential.By synthetically analyzing the datum of literature study, experiment, software develop, conventional logging, imaging logging, hydrofracturing, etc, the paper acquired advancement as follows.(1) In calculation of lithomechanics parameter, on the basis of summarizing former experiential formula, a new formula of compressing strength on rock acquired. the new formula include information of rock density, acoustic velocity and content of clay and the result caculated by the new formulation is greatly in accord with the practice.(2) The interpret of permeability by conventional logging was disagree with practice when fitting perm with porosity, specially to low penetrability carbonatite gas reservoir in this area. This paper firstly fits the perm with prorosity, resistance, content of clay, improved accuracy degree of interpretation of perm by conventional logging.(3) The paper firstly put forward space distribution by using conventional logging and synthetically evaluated off-take potential potential reservoir bed with unit reservoir factor, and ground stress, so that, reservoir bed can be recognized more fully and impersonally.(4) The paper firstly combine ground stress and off-take potential of oil-field development, the paper analyzed the relation among ground stress, off-take potential and micro-fracture, discussed the control role of ground stress to gas off-take potential in low penetrability, carbonatite gas reservoir.更多还原