塔里木盆地克拉苏构造带克深2气藏储层裂缝带发育特征及与产量关系  

Relationship between characteristics of fracture belt and production of Keshen 2 gas reservoir in Kelasu tectonic zone,Tarim Basin

作　　者：周鹏[1] 唐雁刚[1] 尹宏伟[2] 赵双丰[1] 莫涛[1] 张星[1] 朱文慧[1] 李长圣 

机构地区：[1]中国石油天然气股份有限公司塔里木油田分公司勘探开发研究院,新疆库尔勒841000 [2]南京大学地球科学与工程学院,江苏南京210023

出　　处：《天然气地球科学》2017年第1期135-145,共11页Natural Gas Geoscience

基　　金：国家重大专项"塔里木前陆盆地油气成藏;关键勘探技术与新领域目标优选"(编号:2016ZX05003-004);中国石油天然气股份公司专项(编号:2014E-2101);国家自然科学基金项目(编号:41272227;41572187)联合资助

摘　　要：位于塔里木盆地库车坳陷克拉苏构造带中部的克深2气藏,其储集层白垩系巴什基奇克组是库车山前的主力产气层,具有埋藏深度大、基质物性差的特征,裂缝的普遍发育对产量影响大。克深2气藏单井裂缝纵横向发育特征差别较大,目前仍缺少对克深2气藏裂缝带发育模式及其与产量的关系研究,无法做到有效地指导高产井的部署。利用钻井取心、FMI成像并结合地应力、测试资料,开展了克深2气藏纵横向裂缝带发育特征、形成机制的研究,探讨多种成因裂缝带与产量之间的关系,并提出相应的储层改造建议。取得如下认识:1根据裂缝产状,将克深2气藏裂缝发育带在空间上分为纵张裂缝带、网状裂缝带及调节裂缝带3种类型。纵张裂缝带平面上近EW走向,调节裂缝带平面上近SN走向,网状裂缝带则表现为多组走向。2克深2气藏并非平面上裂缝线密度越大、气产量越高,其主要受钻井液体系、钻揭储集层厚度、成像质量3个方面的影响。3克深2气藏发育的3种裂缝带主要受控于中和面效应、构造调节带2种因素。4根据克深2气藏的实钻地质资料、测试资料、构造位置及3种裂缝带的空间组合关系,将克深2气藏平面分为4个等级布井区,为今后克深2气藏开发井部署及相似气藏的高产井部署提供理论依据。As the main gas producing zone,the Cretaceous Bashijiqike Formation of Keshen 2 gas reservoir in Kelasu tectonic belt of Kuqa Depression features in high depth and poor matrix properties.The develop- ment of fractures has large influence on gas production.The characteristics of fractures developed in single well have a big difference both in vertical and horizontal.At present,it is still lack of research on the rela- tionship of fracture characteristics and production,which can guide the deployment of high-producing well effectively.In this paper,the research of characteristics and formation mechanism of fracture belt has been carried out in Keshen 2 gas reservoir, using the data of core, FMI loging, geostress, and test. The relation- ship between fracture belts with different genesis and production also has been discussed,and several sug- gestions on reservoir reconstruction have been given.The results obtained in this research are as follows： ①According to the fracture occurrence,features in Keshen 2 gas reservoir can be divided into longitudinal fracture belt, mesh fracture belt ,transfer structure zone in the space.Longitudinal fracture belt in the space is nearly E-W.Transfer structure zone is nearly S-N direction.Mesh fracture belt always has multiple direc- tion.②The gas production is not always higher with bigger linear density of fracture in the piane in Keshen 2 gas reservoir,which is affected by drilling fluid system, thickness of uncovered reservoir and image quali- ty three aspects.③The three kinds of fracture belt in Keshen 2 gas reservoir are controlled by neutral plane and transfer structure zone.④According to the drilling data,geological data, test data,tectonic location and composition relationships of the three fracture belt in the space,the well spacing area in Keshen 2 gas res- ervoir can be divided into four levels,which can provide a theory for the future well deployment in Keshen 2 gas reservoir and the similar gas reservoir.

关 键 词：克拉苏构造带 克深2气藏 裂缝带特征 中和面 调节裂缝带 

分 类 号：TE371[石油与天然气工程—油气田开发工程]