准噶尔盆地滴南凸起石炭系古火山机构地震特征及有利区预测  

Seismic characteristics of Carboniferous ancient volcanic edifices and prediction of favorable zones in the Dinan bump of the Junggar Basin

作　　者：代春萌[1] 曾庆才[1] 李波[2] 徐淑娟[1] 李璇[1] 杨亚迪 Dai Chunmeng;Zeng Qingcai;Li Bo;Xu Shujuan;Li Xuan;Yang Yadi(PetroChina Research Institute of Petroleum Exploration&Development;PetroChina Xinjiang Oilfield Company)

机构地区：[1]中国石油勘探开发研究院 [2]中国石油新疆油田公司

出　　处：《中国石油勘探》2019年第6期739-749,共11页China Petroleum Exploration

基　　金：国家科技重大专项“大型油气田及煤层气开发”(2016ZX05051-004)

摘　　要：准噶尔盆地滴南凸起石炭系古火山机构复杂,对气藏形成分布和勘探开发有重要影响.基于最新钻井、测井及三维地震数据解释成果,开展滴南凸起石炭系古火山机构特征研究,分析古火山机构对气藏的控制作用.研究认为:①根据火山机构形态和火山岩成分,滴南凸起石炭系古火山机构可划分为裂隙式熔岩火山机构、中心式单火山口碎屑岩火山机构、中心式多火山口复合火山机构、裂隙式侵入火山机构4种类型,受火山喷发—沉积旋回控制,早石炭世以中心式单火山碎屑岩火山机构及裂隙式侵入火山机构为主,晚石炭世以裂隙式熔岩火山机构为主.②古火山机构控制优质储层类型及分布,裂隙式熔岩火山机构发育玄武岩储层,中心式单火山口碎屑岩火山机构发育火山角砾岩和英安岩储层,中心式多火山口复合火山机构发育火山角砾岩和玄武岩储层,裂隙式侵入火山机构发育花岗斑岩储层.③受古火山机构控制发育火山内幕气藏、风化壳气藏、构造—岩性气藏3种类型,有深大断裂沟通的古火山机构为油气运移的有利指向.The Carboniferous ancient volcanic edifices are complex,and have important impacts on the formation and distribution,and exploration and development of the gas reservoirs in the Dinan bump of the Junggar Basin.Based on the interpretation results of new drilling,logging and 3D seismic data,the characteristics of the Carboniferous ancient volcanic edifices and their control on the gas reservoirs were studied and analyzed in the Dinan bump.The study gives the conclusions as follows:a.According to the morphology of the volcanic edifices and the composition of the volcanic rock,the Carboniferous ancient volcanic edifices can be divided into four types of fractured lava volcanic edifice,central single-crater clastic volcanic edifice,central multi-crater composite volcanic edifice and fractured intrusive volcanic edifice.Controlled by volcanic eruption and sedimentary cycles,the Early Carboniferous volcanic edifices are mainly central single-crater clastic volcanic edifices and fractured intrusive volcanic edifices,and the Late Carboniferous ones are dominated by fractured lava volcanic edifices.b.The ancient volcanic edifices control the type and distribution of high-quality reservoirs:the fractured lava volcanic edifice contains basaltic reservoirs,the central single-crater clastic volcanic edifice has breccia and dacite reservoirs,the central multi-crater composite volcano edifice has breccia and basalt reservoirs,and the fractured intrusive volcanic edifice provides granite porphyry reservoirs.c.Controlled by the ancient volcanic edifices,there are inside-volcano gas reservoirs,weathering crust gas reservoirs,and structural-lithologic gas reservoirs;and the ancient volcanic edifices connecting to deep and large faults are favorable targets for hydrocarbon migration.

关 键 词：滴南凸起 石炭系 古火山机构 火山岩储层 气藏类型 成藏模式 

分 类 号：TE112.3[石油与天然气工程—油气勘探]