针对研究区火山岩储层横纵向变化快、储层非均质性强、储层发育模式不清等问题，通过开展对区内28口井观察取样，进行200余块薄片的镜下观察及87块物性样品统计分析，明确了不同岩性的储集物性特征，综合判定研究区总体为中低孔低渗特低渗储层，并总结了火山岩储层孔隙演化过程及物性变化规律；明确了冷凝固结、热液充填作用、构造作用/风化淋滤、埋藏充填、埋藏溶蚀等控储主要因素，最终结合油气运移过程建立起火山岩储层在岩性、不整合、断裂等综合因素控制下的发育模式，为下步有利储层的综合预测打下基础。%The Mesozoic volcanic reservoirs are discovered in Gunan 2 Block and Ken 93 Block in Guxi area,which indicates the huge potential for exploration of the Mesozoic volcanic rocks in this area. Given that the physical properties of Mesozoic volcanic reservoirs vary fast in vertical and horizontal direction,we clarified the physical characteristics of different lithology by observing under microscope 200 slices from 28 wells and did statistical analysis of 87 reservoir property samples,and found out that the reservoir is with middle to low porosity,and low to extra low permeability on the whole. The evolution process of reservoir pore and the law of physical characteristics change are also summarized. The controlling factors of reservoirs,such as condensation-consolidation,hydrothermal filling,structural effect/weathering,burial and dissolution,are clarified. Final-ly,the development model of volcanic reservoirs under the control of lithology,unconformity and fractures are established, combined with the analysis of oil and gas migration process,and the special model of volcanic reservoirs is set up in this region.
展开▼
