摘要
低渗透储层中发育的构造裂缝组系严重影响着油气的流动及分布，其发育方向的准确预测一直是储层物性研究的重点与难点，目前仅停留在基于井点的宏观预测上。采用将构造应力场有限元数值模拟结果与裂缝发育的力学机制相结合的方法，给出一套针对低渗透储层构造裂缝发育方向的定量预测流程，预测结果可定量确定目标区内任一部位的构造裂缝发育方向。应用该方法对松辽盆地北部深层古中央隆起带营城组的构造张裂缝发育方向进行预测的结果表明，计算结果与井点探井成像测井解释结果具有较高的一致性，相对误差均小于10％，效果较好；营城组地层内形成的构造张裂缝主要分布在80°～120°之间，是天然气流动的主导方向，在气藏开发方案设计及井位部署方面应重点考虑。
Groups and series of structural fractures developed in low-permeability reservoirs seriously influence the flow and distribution of oil and gas, the accurate prediction of their development directions is always the key point and difficulty for studies on physical properties of this kind of reservoirs. Unfortunately the above macro-forecasting is just based on well points at present. By adopting the method of integrating the finite-element numerical simulation results of structural stress field with the mechanical mechanism of fracture development, this paper proposes a set of qualitative prediction workflow for the development direction of structural fractures in low-permeability reservoirs, and moreover the above prediction results can qualitatively determine the structural fracture ＇ s development direction of any part in the target region. With the help of the above method, the structural tension fractures＇development directions of Yingcheng Formation in Palaeo-central uplift belt of deep horizons in Songliao Basin have been predicted, the calculation results are highly coincident with those of the image logging interpretation of exploration well points, both relative errors are less than 10%, showing much better results; the distribution of structural fractures generated in Yingcheng Formation mainly locates between 800 and 1 200-the principal direction of natural gas flow, so the above understandings should be mainly considered in gas reservoir development program designs and well arrangement.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2010年第3期22-24,共3页
Petroleum Geology & Oilfield Development in Daqing
关键词
低渗透储层
构造裂缝
发育方向
定量预测
low-permeability reservoir
structural fracture
development direction
quantitative prediction
