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天然气地球科学

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超深层致密砂岩储层裂缝定量评价及预测研究——以塔里木盆地克深气田为例

王俊鹏,张荣虎,赵继龙,王珂,王波,曾庆鲁,刘春   

  1. 中国石油杭州地质研究院， 浙江 杭州 310023
  • 收稿日期:2014-02-14 修回日期:2014-04-19 出版日期:2014-11-10 发布日期:2014-11-10
  • 作者简介:王俊鹏(1983-)，男，河北石家庄人，工程师，硕士，主要从事储层地质及裂缝预测研究.E-mail:wangjp_hz@petrochina.com.cn.
  • 基金资助:
    国家科技重大专项“高压气藏安全高效开发技术”(编号:2011ZX05015-002);“前陆冲断带异常高压气藏高效开发技术”(编号:2011ZX05046-003)|中央高校基本科研业务费专项资金(编号:12CX06004A)联合资助.

Characteristics and Evaluation of Fractures in Ultra-deep Tight Sandstone Reservoir:Taking Keshen Gasfield in Tarim Basin,NW China as an Example

WANG Jun-peng,ZHANG Rong-hu,ZHAO Ji-long,WANG Ke,WANG Bo,ZENG Qing-lu,LIU Chun   

  1. Hangzhou Institute of Geology,Research Institute of Exploration and Development,PetroChina,Hangzhou 310023,China
  • Received:2014-02-14 Revised:2014-04-19 Online:2014-11-10 Published:2014-11-10

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摘要： 塔里木盆地库车坳陷克深气田区白垩系巴什基奇克组是库车山前的主力产气层段，具有埋深大、基质物性差、构造裂缝整体发育的特征。利用钻井取心、FMI成像、钻完井漏失量、试采压力恢复资料，结合CT扫描定量分析、高压压汞、扫描电镜、裂缝充填物测年等实验分析方法，开展了低地震资料品质下的超深层致密砂岩储层裂缝的定量评价与预测。认为克深气田区总体发育3期构造裂缝，以高角度半充填剪切缝为主，有效开启度为50~300μm，主要走向以近SN向为主，见EW走向裂缝|主要受古应力的大小及方向控制，同时受地层原始岩性组构影响|第三期构造裂缝与储层演化配置关系最好，对储层渗透率的提升起到关键作用。裂缝的高渗流区主要分布在背斜高部位、断裂的转折端及次级断裂附近。构造裂缝有效沟通了单砂体，可整体提高储层渗透率1~3个数量级，构造裂缝派生的微裂缝可有效沟通其周围的基质孔喉，沿裂缝网络更易发育次生溶蚀孔隙。

关键词: 致密砂岩, 储层, 裂缝评价, 深层, 塔里木盆地

Abstract: The Cretaceous Bashijiqike Formation of Keshen Gasfield in Kuqa Depression of Tarim Basin,main gas producing zone,is fracture-type reservoir.The burial depth of sandstone reservoir was over 6 000m.Characteristics and evaluation of fractures of ultra-deep tight sandstone reservoir were constructed by core description,FMI,drilling leakage,build-up of pressure during producing test and CT scanning,high-pressure mercury intrusion method,SEM,isotopic dating of fracture stuff.There are 3 evolution stages of fractures,which demi-hydraulic filled,high angle，effective opening at 50-300μm,heading for N-S orientation mainly,some in W-E orientation in Keshen Gasfield.The fractures development affected by composition of formation is controlled by palaeo-stress.The third stage fractures can improve reservoir permeability effectively.High position of anticline,transition of faults and secondary faults are the areas with high fracture permeability.Fractures can connect the single sand body effectively,and improve reservoir permeability at 1-3folds.The micro-fracture can connect pore and throat of reservoir around main fracture,making secondary corrosion pore easily.

Key words: Tight sandstone, Reservoir, Fracture evaluation, Ultra-deep, Tarim Basin

中图分类号: 

  • TE122.2
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