元坝须三段致密储集层裂缝的常规测井识别与评价  

Conventional Logging Identification and Evaluation of Fractures in Dense Reservoir of the 3rd Member of Xujiahe Formation in Yuanba Gas Field

作　　者：冯晓明[1,2] 程洪亮[2] 李毓[2] 黎静容[2] 

机构地区：[1]成都理工大学能源学院,四川成都610059 [2]中国石化西南油气分公司勘探开发研究院,四川成都610041

出　　处：《辽宁化工》2015年第4期463-466,共4页Liaoning Chemical Industry

摘　　要：元坝地区须三气藏储集层以中粗粒钙屑砂岩、粉细砂岩为主,孔隙度平均值1.82%~2.61%,渗透率平均值0.016~0.029 m D,属低孔低渗致密砂岩储层,储集层裂缝较发育,且裂缝对改善储集层的孔隙度和渗透率影响较大。本文运用常规测井资料通过岩心标定裂缝的测井响应特征,利用砂岩裂缝交会分析方法,优选声波时差、密度两个参数建立的判别方程,通过逐步判别识别原理及概率计算,对单井进行裂缝识别,并进行裂缝孔隙度和宽度的计算,绘制单井裂缝参数解释剖面,评价单井裂缝发育情况,建立该储集层裂缝识别的综合标准。The reservoir of the 3rd member of Xujiahe formation in Yuanba area is tight sandstone reservoir with low porosity and low permeability, which has an average porosity of about 1.82%~2.61% and an average permeability of about 0.016~0.029 m D, medium-coarse calcarenaceous sandstone and fine sand are dominant, fractures have developed, and the fractures have great influence on the improvement of porosity and permeability. In this paper, based on the conventional logging data, by using the technology of core calibration that can identify logging response characteristics of fracture, through sandstone fracture intersection analysis, parameters of acoustic time and density were optimized to establish the distinguishing equation. Through stepwise discrimination analysis and probability calculation, fracture identification of single well was carried out, the porosity and width of the fracture were calculated, profile interpretation of single well fracture parameters was obtained, fracture development of single well was evaluated, and then comprehensive standard of reservoir fracture identification was established.

关 键 词：元坝 须三段 致密储集层 常规测井 裂缝 识别与评价 

分 类 号：TE122[石油与天然气工程—油气勘探]