天然气地球科学

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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

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2   

  1. 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
  • 收稿日期:2016-06-15 修回日期:2016-09-14 出版日期:2017-01-10 发布日期:2017-01-10
  • 通讯作者: 尹宏伟(1971-),男,江西上饶人,教授,博士,主要从事构造变形特征、变形机制,构造物理及数值模拟研究和教学工作. E-mail:hwyin@nju.edu.cn.
  • 作者简介:周鹏(1987-),男,黑龙江伊春人,工程师,硕士,主要从事裂缝评价、预测及断背斜应力中和面研究. E-mail:zhoup1-tlm@petrochina.com.cn.
  • 基金资助:

    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.

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

Zhou Peng1,Tang Yan-gang1,Yin Hong-wei2,Zhao Shuang-feng1,Mo Tao1,Zhang Xing1,Zhu Wen-hui1,Li Chang-sheng2   

  1. 1.Exploration and Development Research Institute,Tarim Oilfield Branch Company,CNPC,Korla 841000,China;
    2.School of Earth Science and Engineering,Nanjing University,Nanjing 210023,China
  • Received:2016-06-15 Revised:2016-09-14 Online:2017-01-10 Published:2017-01-10

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。

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

Abstract:

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 development 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 relationship 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 relationship between fracture belts with different genesis and production also has been discussed,and several suggestions 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 direction.②The gas production is not always higher with bigger linear density of fracture in the plane in Keshen 2 gas reservoir,which is affected by drilling fluid system,thickness of uncovered reservoir and image quality 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 reservoir 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.

Key words: Kelasu tectonic belt, Keshen 2 gas reservoir, Feature of fracture belt, Neutral plane, Transfer fracture zone

中图分类号: 

  • TE371

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