松辽盆地XS气田营城组火山岩储层储集空间类型及形成演化  

Type and evolution of volcanic rock reservoir space in Yingcheng Formation,XS gas field,Songliao Basin

作　　者：许继策 白晓龙 李刚 XU Jice;BAI Xiaolong;LI Gang(No.1 Mud Logging Company,BHDC,CNPC,Tianjin 300280,China)

机构地区：[1]中国石油渤海钻探第一录井公司

出　　处：《录井工程》2024年第1期136-145,共10页Mud Logging Engineering

摘　　要：为研究确定松辽盆地XS气田营城组致密火山岩储层储集空间类型及优质储层成因,综合岩石薄片、扫描电镜等多种技术资料,在XS气田营城组火山岩储层特征、储集空间研究基础上,恢复致密火山岩孔隙的形成演化。结果表明:(1)XS气田营城组火山岩储集空间包括原生孔、次生孔和裂缝3大类16种类型;(2)火山岩储集空间的形成经历了初始成岩、表生淋滤和埋藏成岩3个阶段,初始成岩期的冷凝成岩和气体逸出形成各类原生孔隙,虽然表生淋滤期热液蚀变和深埋成岩期碳酸盐胶结造成储层物性大量损失,但大气淡水和有机酸溶蚀形成的次生孔隙有利于物性改善,构造破裂形成的裂缝作为流体运移通道促进了次生溶蚀作用的进行;(3)岩性、岩相、构造和成岩作用共同控制了火山岩储集空间和物性的演化,其中岩性为次生改造提供了物质基础,岩相控制了原生孔隙的形成与分布,构造作用形成不同规模的裂缝,增加储集空间、沟通不同类型孔隙提高渗透性,不同类型胶结物的沉淀等成岩作用,造成原生孔隙丧失和次生孔隙破坏。该研究为XS气田优质储层预测和高效开发提供了依据。To study and determine the space type of tight volcanic rock reservoir and the formation reason of high quality reservoir of XS gas field in Yingcheng Formation,Songliao Basin,this paper restore the formation and evolution of tight volcanic rocks on the basis of volcanic rock cause analysis,with the combination of the data such as thin sections and scanning electron microscope.The results show as follows:(1)the space type of tight volcanic rock reservoir of XS gas field includes 3 categories 16 kinds.The three categories are primary hole,secondary hole and crack;(2)the reservoir space evolution has experienced three stage such as the initial diagenesis stage,supergene leaching stage and burial digenesis stage.The condensed diagenesis and gas of the initial diagenesis escapes and forms various initial pores.Although hydrothermal alteration of the initial diagenesis stage and carbonate cementation of supergene leaching stage make a large loss of reservoir physical property,secondary hole formed by the dissolve corrosion of atmospheric fresh water and organic acid is beneficial for physical property.The cracks of structure destroy,as the fluid flowing channel,promote the secondary dissolution;(3)the evolution of volcanic rock storage and physical properties is controlled by rock properties,rock phase,tectonic action and diagenesis action.The rock properties provide material basis for secondary transformation.Rock phase controls the formation and distribution of initial pores.Tectonic action makes different cracks,increases storage space and improvs permeability of different types of pores and the sedimentation of different types of cement,making loss of initial pores and destruction of secondary hole.This study provides a basis for high quality reservoir prediction and efficient development of XS gas field.

关 键 词：孔隙演化 火山岩 营城组 储集空间类型 岩石薄片 松辽盆地 

分 类 号：TE132.1[石油与天然气工程—油气勘探]