页岩气“甜点”评价与预测——以四川盆地建南地区侏罗系为例.pdf

第34卷第2期
石油宾發地质
Vol 34 No.2
2012年3月
PETROLEUM GEOLOGY EXPERIMENT
Mar..2012
文章编号:1001-6112(2012)02-0109-(06
页岩气甜点”评价与预测
以四川盆地建南地区侏罗系为例
周德华,焦方正
(中因石油化工股份有限公司油田勘探开发事业部,北京100728
摘要:该文提出了页岩气“甜点”评价体系、关键步骤及核心参数评价法和标准,并以四川盆地建南地区休罗系为例,应用该评价
体系,研究了页岩气储层“甜点”基本地质特征,预测了“甜点”分布规律,提出了劫探评价井部署井位,并取得了良好的效果。研
究表明:1)与常规油气评价不同,非常规页岩气评价及勘探开发需要采用地质与工程一体化评价方法,综合集成地质、地球化学
石油工程、岩石力学和油层物理等多学科的成果,综合评价;2)建页HF-1井长水平段压裂成功显示建南地区侏罗系页岩气具有
良好的开发前景;3)制作顶岩厚度、o(TOC)等值线、R。等值线、页岩埋深等多因素叠合综合分析图件,对页岩气有利“甜点”预测
和勘探开发部署具有很好的指导作用。
关键词:甜点;勅探评价;页岩气:侏罗系;建南地区;四川盆地
中图分类号:TE132.2
文献标识码:A
Evaluation and prediction of shale gas sweet spots
a case study in Jurassic of Jiannan area, Sichuan Basin
Zhou Dehua, Jiao Fangzheng
Department of Oil and Gas Exploration and Development, SINOPEC, Bejing 100728, hina)
Abstract: The evaluation system, critical steps and key parameters for shale gas sweet spots were discussed in
this paper. A case study was carried out in Jurassic of Jiannan area of the Sichuan Basin. By means of the evalu
ation system, the geologic features of sweet spots in shale gas reservoirs were analyzed, the distribution pattern of
sweet spots were predicted, and the arrangement of exploration wells were put forward, resulting in good effeets
It was concluded as followed. 1 Different from conventional petroleum evaluation, the evaluation and explora
tion of unconventional shale gas demanded an unconventional approach combining geology with engineering. Ge-
ology chemisry, petroleum engineern lithomechanics and petrophysics all contributed to the evaluation
2) The success of long-distance horizontal fracturing in well Jianye HF-1 proved good potential for shale gas ex-
oloration in Jurassic of Jiannan area. 3) The maps of shale thickness, o(TOC), R, and burial depth might
guide shale gas sweet spots exploration
Key words: sweet spot exploration evaluation; shale gas; Jurassic; Jiannan area; Sichuan Basin
1页岩气研究现状
页岩气已然成为非常规天然气全球油气资源勘
探开发的新亮点1。初步研究表明,我国南方中
页岩气是指主体位于暗色泥页岩或高碳泥页上扬子地区的下古生界、华北地区的石炭一二叠系
岩中,以吸附或游离状态为主要存在方式的天然气鄂尔多斯盆地的三叠系、西北地区的侏罗系是页岩
聚集。天然气也存在于夹层状的粉砂岩、粉砂质泥气勘探的有利层位913,具有广阔的勘探开发前景
岩、泥质粉砂岩、甚至砂岩地层中,表现为典型的
2009年四川盆地建南地区建35-2井在侏罗
“原地”成藏模式?;在成藏机理上既具有吸附、系自流井组珍珠冲段中途测试获得7724m3/d工
游离、水溶等多重特征,又具有自生、自储、自保、储业气流后,部署实施了建111井,在下侏罗统自流
层致密的特点,为一种典型的连续性大规模、低丰井组东岳庙段采用水力压裂测试获得了3661m3/d
度、非常规的天然气聚集3?。
T业气流,实现了鄂西渝东地区侏罗系页岩气勘探
收稿日期:2011-12-01;修订日期:2012-02-06。
作者简介:周徳华(1968一)、男,博士,高级工程师,从事非常规油气开发生产管理与研究。E-mail:though@Sinope.com。