中基性火山岩储层特征及岩石力学实验评价研究  

Research on Characteristics of Medium Basic Volcanic Rock Reservoirs and Experimental Evaluation of Rock Mechanics

作　　者：齐士龙[1,2,3] 刘登元 唐鹏飞 杨春城[1,2,3] 张兴雅 Qi Shilong;Liu Dengyuan;Tang Pengfei;Yang Chuncheng;Zhang Xingya(Production Technology Institute of Daqing Oilfield Limited Company;Heilongjiang Provincial Key Laboratory of Oil and Gas Reservoir Stimulation;State Key Laboratory of Continental Shale Oil)

机构地区：[1]大庆油田有限责任公司采油工艺研究院 [2]黑龙江省油气藏增产增注重点实验室 [3]多资源协同陆相页岩油绿色开采全国重点实验室

出　　处：《采油工程》2024年第3期67-74,95,共9页Oil Production Engineering

基　　金：中国石油勘探重大专项课题“松辽盆地风险勘探领域和目标研究、工程技术攻关现场试验”(2011ZX05062)

摘　　要：目前,松辽盆地中基性火山岩储层是深层天然气勘探开发的重要领域,资源潜力大。储集空间复杂多样,以中基性安山岩、玄武岩为主,储层厚度小、物性差,属于低孔低渗储层。以往采用常规直井的成熟压裂技术,压裂改造效果差,工业率不足50%;水平井采用裸眼完井压裂工艺,部分采油井压裂初期能获得一定产能,但由于缝控改造体积小,稳产能力弱,效益开采价值低。为了更好地对储层进行针对性改造,需认清储层地质特征及岩石力学性质,通过分析储层孔隙分布特征、天然裂缝特征、储层孔渗特征,开展岩石力学三轴实验、岩石地应力测试、岩石断裂韧性实验,获取岩石力学参数,明确力学性质、脆性特征及裂缝形态等,为深入认识储层和形成增产改造技术攻关提供技术支撑,为中基性火山岩压裂优化设计提供理论依据。Currently,the medium basic volcanic rock reservoirs in the Songliao Basin are the important area for deep natural gas exploration and development,with great potential resource.The reservoir space is complex and diverse,mainly composed of medium basic andesite and basalt,with small reservoir thickness and poor physical properties,belonging to low porosity and low permeability reservoirs.In the past,mature fracturing technologies in conventional vertical wells had poor fracturing and stimulation effects,with an industrial rate of less than 50%.In horizontal wells,open-hole completion and fracturing technologies were used,and some oil production wells could achieve certain amount of production capacity in the initial stage after fracturing.However,due to the small stimulation volume of fracture control,the stable production capacity was weak,with low value for economical production.In order to carry out the targeted stimulation for reservoirs,it is necessary to understand the geological characteristics and rock mechanical properties of reservoirs.By analyzing three characteristics of reservoir pores distribution,natural fracture and reservoir pore permeability,and conducting rock mechanics triaxial experiments,rock terrestrial stress test,and rock fracture toughness experiments,the rock mechanics parameters have been obtained to clarify the mechanical properties,brittle characteristics,and fracture morphology.It provides the technical support for a comprehensive understanding of reservoirs and the development of production stimulation technologies,and provides theoretical basis for the optimal design of fracturing in medium basic volcanic rocks.

关 键 词：中基性火山岩 天然裂缝 岩石力学 地应力 断裂韧性 脆性 

分 类 号：P618.13[天文地球—矿床学]