摘要
储层裂缝定量预测是塔里木盆地克拉苏构造带克深2区块后期开发工作的重要保障。在对单井裂缝特征进行描述以及通过构造解析和反演拟合确定古今地应力的基础上,建立了研究区的力学模型,并结合地应力与裂缝参数之间的定量关系,对克深2区块巴什基奇克组的储层裂缝进行了数值模拟。结果显示,断层带是裂缝各项参数的高值区,背斜顶部具有裂缝线密度低而裂缝开度、裂缝孔隙度和裂缝渗透率高的特征,背斜翼部则与之相反。分析其原因认为,断层带附近裂缝密度大,沟通了单砂体,背斜高部位相对翼部裂缝密度低,但裂缝整体开度大,充填程度弱,有效性高。数值模拟结果与单井岩心裂缝、成像裂缝解释结果匹配较好,预测开发井裂缝渗透率符合率约75%,为塔里木盆地克拉苏构造带克深区块的天然气勘探与开发提供了一定依据。
Quantitative prediction of reservoir fracture is an important guarantee of development in later period of Keshen-2 Block in Kelasu Structural Belt of Tarim Basin.Based on the description of single well fracture char-acter and the confirmation of paleo-and current crustal stress by structural analysis and inversion matching,me-chanical model of research area is built,and numerical simulation of reservoir fracture in Bashijiqike Formation of Keshen-2 Block is carried out combining with the quantitative relationship between crustal stress and fracture parameters.The result shows that fault belts are high value area of fracture parameters,and the top of anticline has low linear density and high aperture,porosity and permeability of fracture while the wing is on the contrary. The reason is that near fault zone the fracture where has high linear density,and the fracture communicate the single sand body.while the high position of anticline where has low linear density,high aperture,weak filling and high effectiveness.The results of numerical simulation has a better matching with single well core fracture and imaging fracture interpretation results.The prediction of fracture permeability of development well is as high as 75%,which provides a basis for the natural gas exploration and development of Keshen-2 Block in Kelasu Structural Belt of Tarim Basin.
出处
《现代地质》
CAS
CSCD
北大核心
2014年第6期1275-1283,共9页
Geoscience
基金
国家科技重大专项"高压气藏安全高效开发技术"(2011ZX05015-002)
中央高校基本科研业务费专项资金项目(12CX06004A)
关键词
克深2区块
地应力
储层裂缝
定量参数
数值模拟
Keshen-2 Block
crustal stress
reservoir fracture
quantitative parameter
numerical simulation
