
第38卷第5期 2017年10月
文章编号:1001-3873(2017)05-0592-07
新疆石油地质
XINJIANG PETROLEUM GEOLOGY DOI:10.7657/XJPG20170514
Vol.38,No.5 Oct.2017
东胜气田什股壕地区水平井高产水原因及储集层改造
王东辉”,曹绍贺,归平军”,张永春”
(中国石化华北油气分公司a.勘探开发研究院;b.工程技术研究院,郑州450006)
摘要:东胜气田什股壕地区部分水平井测试中高产水,影响了气田的产能建设。为查明气蒸类型及气水分布,结合单层产出特征,对测试并进行筛选,应用交会图版分析,建立了下石盒子组气藏气水层的测并识别标准,并查明了盒2 段和盒1段的气水分布特征。分析施工参数与压裂缝高的关系后认为,施工排量对压裂缝高影响较大,并建立了气藏压裂规模与压裂终高的关系,从面可有效判断不同压裂规模下的压裂终高。结合水罩段钻遇测井电性参数、微裂续分布、压裂缝高以及储集层和隔层厚度等参数,明确了造成水平井高产水的3种原因,提出了“一井一策"的储集层改造对策。关键词:东胜气田;什股壕地区;水平井;高产水;压裂缝高;储集层改造
中图分类号:TE371
文献标识码:A
Reasons of HighWaterYield andReservoirReformationinHorizontal WellsinShiguhaoArea
ofDongshengGasField
WANG Donghui', CAO Shaohe', CUI Pingjun', ZHANG Yongchun
(Sinopec North China Branch, a.Research Institute of Exploration and Development; b.Research Institute of Engineering Technology,
Zhengzhou, Henan 450006, China)
Abstract: High water yield occurs during production test in some horizontal wells in Shiguhao area of Dongsheng gas field, which impacts the productivity construction in the gas field. In order to define gas reservoir type and hydrocarbon distribution, the paper conducts wellse-lection for test by combining with single layer production characteristics, establishes well-logging standards for gas zone and aquifer identi-fication for the Lower Shihezi formation on the basis of crossplot chart analysis and determines the gas and water distribution in Hel and He 2 section. After analyzing the relationship between construction parameter and hydraulic fracture height, it is considered that construc-tion displacement has a significant impact on hydraulic fracture height. The relationship between fracturing scale and hydraulic fracture height in gas reservoirs is established and fracture heights under different fracturing scales can be effectively determined. Combined with electrical parameter, microfracture distribution, fracture height and thickness of reservoir and interlayer etc., 3 reasons causing the high wa-
ter yield are identified in horizontal wells and a “one measure in one well "reservoir reformation countermeasure is put forward. Keywords: Dongsheng gas field; Shiguhao area; horizontal well; high water yield; hydraulic fracture height; reservoir reformation
东胜气田位于鄂尔多斯盆地北部,横跨伊盟隆起、伊陕斜坡和天环坳陷3个构造单元。什股壕地区位于伊盟隆起东南部,杭锦旗断阶东段"(图1),为向西南倾斜的单斜,受古地形及燕山构造运动的影响,挤压褶皱背斜、披覆型背斜较为发育。
研究区在石炭一二叠纪发育了一套内陆碎屑岩沉积体系,沉积相展布及演化受古地貌及构造作用控制。在地质演化中始终处于相对的隆起状态。伊盟北部隆起在地史上属于长期隆起区,石炭一二叠系以不同层位超覆于太古宇一中元古界之上,二叠系为套河流一冲积平原沉积体系的陆相碎屑岩。主要目的层为下二叠统下石盒子组,为一套由北而南的冲积平原辩状河沉积,厚130m左右。接旋回性,可分为盒1段、盒2段和盒3段,盒1段沉积期是辫状河发育
收稿日期:2017-05-11
修订日期:2017-06-29
基金项目:国家科技重大专项(2016ZX05048)
乌加腐凹陷
伊
天环地陷
86
3 9825
起
隆
杭锦旗断阶
杭锦旗 102
■乌兰吉林庙887
伊
锦评1 编44
的务让有了
46
872
图1什股壕地区构造位置
编94
伊金徽济旗被
回什股综地区
的鼎盛阶段,砂砾岩、含砾粗砂岩厚度大,分布较广泛;盒2段一盒3段,基本上继承了盒1段的沉积面税,但河流规模缩小,地层厚度逐步减小,横向上仍可对比。天然气主要源于断裂以南地区的烃源岩,经
作者简介:王东辉(1982-),男,河南柘城人,工程师,开发地质,(Tel)0371-86035103E-mail)Swordwang516@163.com 万方数据