准噶尔盆地改造残留古火山机构判识与油气勘探实践  

Identification and oil and gas exploration practices of reworked residual paleovolcanic edifice in the Junggar Basin

作　　者：黄芸[1] 梁舒艺 贾春明[1] 谷新萍[1] 毛海波[1] 伏小鹏 HUANG Yun;LIANG Shuyi;JIA Chunming;GU Xinping;MAO Haibo;FU Xiaopeng(Exploration and Development Research Institute,PetroChina Xinjiang Oilfield Company,Urumqi,Xinjiang 830013,China;School of Geosciences and Technology,China University of Petroleum-East China,Qingdao,Shandong 266580,China)

机构地区：[1]中国石油新疆油田公司勘探开发研究院 [2]中国石油大学(华东)地球科学与技术学院

出　　处：《天然气工业》2020年第3期30-37,共8页Natural Gas Industry

基　　金：中国石油天然气股份有限公司科技项目“准噶尔盆地天然气藏主控因素及关键技术研究与应用”(编号:2017E-0403)。

摘　　要：目前,由于经历多期构造运动和风化剥蚀改造导致变形的准噶尔盆地盆腹区石炭系火山机构的可操作性识别技术体系尚未形成,制约了该区石炭系火山岩气藏的勘探开发进程。为此,通过对地面露头火山口、火山口相典型岩性组合、非地震电法剖面、地震相及地震属性等判识特征的分析,总结了该区火山机构的综合识别方法及地震资料处理关键技术,明确了火山岩优质储层的分布特征,并以金龙油田和克拉美丽气田为实例,预测火山岩优质储层分布有利区、指导钻井试油层位优选。研究结果表明:(1)该盆地周缘地面露头古火山机构样式的识别可为盆内深层古火山机构的识别提供可靠的实物模型,对盆山一体化研究具有重要的意义;(2)隐爆角砾岩、熔结火山角砾岩、珍珠岩及球粒流纹岩等是识别古火山口的重要岩性标志,火山岩优质储层主要分布于爆发相的火山角砾岩和溢流相火山熔岩;(3)重磁力勘探能区分火山岩和沉积岩,但纵向分辨率低,建场测深电法勘探则弥补了这一缺陷,其电阻率反演剖面表征的火山岩体形态产状可作为判别火山机构的依据;(4)地震剖面相面法可以识别火山机构的纵向特征,三维地震属性可以提供火山机构的平面分布信息,但均离不开较好的地震资料品质。结论认为:(1)地震资料处理成像技术是依托地震资料判识改造残留古火山机构的关键技术;(2)所形成的火山机构综合判识方法应用效果好,可以预测火山岩储层的平面分布,进而指导井位部署、地质工程设计和试油层位选择。By now,no any operable identification technology system has been developed for the Carboniferous volcanic edifice in the belly area of the Junggar Basin which is deformed due to multi-stage tectonic movement and weather-worn reworking,which restricts the exploration and development process of the Carboniferous volcanic gas reservoirs in this area.By analyzing the identification characteristics(e.g.the outcrop volcanic crater,the typical lithological combination of volcanic crater facies,the resistivity section inversed by the electric field sounding,the seismic facies and the seismic attributes),this paper summarized the comprehensive identification methods and the key seismic data processing technologies for the volcanic edifices in this area and defined the distribution characteristics of high-quality volcanic reservoirs.In addition,the areas favorable for the distribution of high-quality volcanic reservoirs were predicted by taking Jinlong and Kelameili gas fields as examples,so as to provide the guidance for the selection of well test horizons.And the following research results were obtained.First,the recognition of the outcrop paleovolcanic edifice pattern around the Junggar Basin can provide a reliable physical model for the identification of the deep-seated paleovolcanic edifice in the basin,which is of great significance to the basin-mountain integrated study.Second,cryptoexplosive breccia,fused volcanic breccia,perlite and spherulite rhyolite are important lithologic signs to identify paleovolcanic craters.High-quality volcanic reservoirs are mainly distributed in the volcanic breccia of explosive facies and the volcanic lava of overflow facies.Third,by virtue of gravity and magnetic exploration,volcanic rocks and sedimentary rocks can be distinguished,but the vertical resolution is low.This defect is made up for by the method of artificial electric field sounding.The form and occurrence of volcanic rocks represented in the resistivity inversion section can be used as the basis for the identification of

关 键 词：准噶尔盆地 石炭纪 火山岩气藏 改造残留古火山机构 火山岩相 判识方法 储集层分布 油气勘探实践 

分 类 号：P618.13[天文地球—矿床学]