CAJ | 학술논문

兴城气田火山岩储层岩性复杂,储集性能迥异.为了比较不同火山岩储集特征,寻找优质储集体,从火山岩储层孔隙成因及演化入手,应用岩心分析测试及镜下鉴定手段,对岩石组构、成岩作用以及储层物性对构造作用的响应3个岩石储集性能的影响因素进行研究,分析对比了兴城气田各类火山岩进行储集性能.分析认为,火山岩储层物性主要受成岩作用的类型及发育程度以及构造作用控制,而岩石组构决定了火山岩所发生的成岩作用类型,也决定了构造作用对储层的改造程度,有利的岩石组构是是形成优质储集体的前提;即岩石组构、成岩作用、构造作用三者影响储集空间的演化,岩石组构是火山岩储层储集性能的主要控制因素:研究区内有利岩石组构储集岩性有火山角砾岩、气孔流纹岩、角砾熔岩;其中,角砾熔岩的岩石组构利于原生孔隙的保存与次生孔隙的发育,储集性能最优,火山角砾岩与流纹岩次之,火山集块岩、凝灰岩、致密流纹岩、低孔流纹岩不易形成有效储集体.
흥성기전화산암저층암성복잡,저집성능형이.위료비교불동화산암저집특정,심조우질저집체,종화산암저층공극성인급연화입수,응용암심분석측시급경하감정수단,대암석조구、성암작용이급저층물성대구조작용적향응3개암석저집성능적영향인소진행연구,분석대비료흥성기전각류화산암진행저집성능.분석인위,화산암저층물성주요수성암작용적류형급발육정도이급구조작용공제,이암석조구결정료화산암소발생적성암작용류형,야결정료구조작용대저층적개조정도,유리적암석조구시시형성우질저집체적전제;즉암석조구、성암작용、구조작용삼자영향저집공간적연화,암석조구시화산암저층저집성능적주요공제인소:연구구내유리암석조구저집암성유화산각력암、기공류문암、각력용암;기중,각력용암적암석조구리우원생공극적보존여차생공극적발육,저집성능최우,화산각력암여류문암차지,화산집괴암、응회암、치밀류문암、저공류문암불역형성유효저집체.
The reservoir in Xingcheng gas field has a complex lithology.In order to study the diversity of the capability of reservoirs and to find a most favorable reservoir,this paper analyzes the pore genesis and evolution,the petrosal structural fabric,and the physical properties related with tectonic disturbance,as the controlling factors of the reservoir storage.The results show that reservoir physical properties influence the diagenesis type and development,and tectonic disturbance.The petrosal structural fabric controls diagenesis and the physical properties related with tectonic disturbance.Advantageous petrosal structural fabric is a very important prerequisite for a favorable reservoir formation and is the main controlling factor for volcanic reservoir properties.In the studied area,the favorable reservoir rocks comprise volcanic rubble,rubble lava,and porous rhyolite,where rubble lava is the most important component,volcanic rubble and porous rhyolite take the second place,volcanic agglomerate,tuff,competent rhyolite,and low-porosity rhyolite can hardly be the effective reservoir rocks.