湖相白云岩成因模式及其储集性  

GENETIC MODEL AND RESERVOIR PROPERTY OF LACUSTRINE DOLOMITE

作　　者：潘星[1] 王海琦 潘晓青 PAN Xing WANG Hai-qi PAN Xiao-qing(Geological Science and Mineral Resources of Lanzhou University ＆ Key Laboratory of Western China＇s Mineral Resources of Gansu Province, Lanzhou 730001, China Gansu Provincial Bureau of Gealogy and Mineral Exploration and Development,Lanzhou 730000, China Xi＇an Institute of Surveying and Mapping, Xi＇an 710054, China)

机构地区：[1]兰州大学地质科学与矿产资源学院&甘肃省西部矿产资源重点实验室,甘肃兰州730000 [2]甘肃省地矿局,甘肃兰州730000 [3]西安市勘查测绘院,陕西西安710054

出　　处：《甘肃地质》2016年第2期76-83,共8页Gansu Geology

基　　金：国家自然科学基金资助项目(编号:41173014)

摘　　要：湖相白云岩的成岩作用是非常规油气储层中非常活跃的话题,其成因模式以及储集性的研究对以碳酸盐岩为储层的油气勘探具有重要意义。通过综述前人关于湖相碳酸盐岩领域的研究成果,总结出以下几点:湖相白云岩成因模式主要有原生生物成因、准同生成因以及热液成因;湖相白云岩的储集空间类型包括以生物体腔孔为代表的原生孔、酸性流体作用下形成的溶蚀孔洞、白云石化作用或重结晶作用形成的晶间孔以及构造应力作用下形成的裂缝等4大类;其物性和孔隙结构分别受控于沉积环境及生物种类、酸性流体的溶蚀能力、白云岩化模式以及构造活动强度和岩石脆性等。以上研究成果可为湖相碳酸盐岩,乃至其他成因的碳酸盐岩物性影响因素以及油气地质意义研究提供借鉴参考。Lacustrine dolomite diagenesis is a very active topic in unconventional oil and gas reservoirs. The research about its genetic model and reservoir has high significance for oil and gas exploration which takes carbonate rocks as reservoir. In this paper, we take all these as research objects. Through reviewing the results of previous studies by lacustrine carbonate rocks, we draw the following conclusions： lacustrine dolomite genesis model mainly include primary biogenic genetic model, penecontemporancous genetic model, and hydrothermal hydrothermal genesis. The lacustrine carbonate rock reservoir space mainly has four types, include biological body pore, dissolution pores formed by acidic fluid, intergranular pores formed by dolomitization or recrystallization, and cracks formed by tectonic stress. Its physical properties and pore structure are separately controlled by depositional environment and biological species, dissolution ability of acidic fluids, dolomitization modle, intensity of tectonic activities, rock brittleness and so on. The above research can provide reference for lacustrine carbonate rocks and physical properties factors about other causes of carbonate.

关 键 词：湖相白云岩 成因模式 储集空间类型 控制因素 

分 类 号：P618.13[天文地球—矿床学]