CAJ | 학술논문

准噶尔盆地西北缘金龙2井区二叠系佳木河组裂缝是该区火山岩储层油气主要的渗流通道。综合岩心、岩石薄片及成像测井等资料，识别出该区主要发育的裂缝类型为半充填或未充填高角度缝，其次为半充填低角度斜交缝与网状缝。成像测井解释裂缝方位近东西向，与岩心古地磁解释现今地应力最大主应力方向近似平行，有效性开启较好。火山岩储层裂缝发育主要受构造与岩性两种因素影响。距离断层越近，由于构造曲率增大，裂缝越发育，裂缝多沿断裂呈条带状分布。不同的火山岩类型，裂缝发育程度也不同。通过成像测井资料分析，认为研究区中酸性火山熔岩及火山碎屑熔岩裂缝较发育，并进一步定量计算出单井裂缝密度、裂缝倾角、裂缝孔隙度等，确定单井裂缝发育特征。结合叠前地震预测方法，即叠前方位各向异性法（AVAZ），优选衰减起始频率属性，预测了佳木河组火山岩储层裂缝分布特征。
준갈이분지서북연금룡2정구이첩계가목하조렬봉시해구화산암저층유기주요적삼류통도。종합암심、암석박편급성상측정등자료，식별출해구주요발육적렬봉류형위반충전혹미충전고각도봉，기차위반충전저각도사교봉여망상봉。성상측정해석렬봉방위근동서향，여암심고지자해석현금지응력최대주응력방향근사평행，유효성개계교호。화산암저층렬봉발육주요수구조여암성량충인소영향。거리단층월근，유우구조곡솔증대，렬봉월발육，렬봉다연단렬정조대상분포。불동적화산암류형，렬봉발육정도야불동。통과성상측정자료분석，인위연구구중산성화산용암급화산쇄설용암렬봉교발육，병진일보정량계산출단정렬봉밀도、렬봉경각、렬봉공극도등，학정단정렬봉발육특정。결합첩전지진예측방법，즉첩전방위각향이성법（AVAZ），우선쇠감기시빈솔속성，예측료가목하조화산암저층렬봉분포특정。
The fractures of Jiamuhe Formation of Permian volcanic reservoir are the main flowing channels for the reservoir in Jinlong 2 oil field .Through core observation ,thin slice identification ,and image logging data , the fracture types are identified : Unfilled or half‐filled high‐angle fractures are mainly develop in the reservoir ,followed by half‐filled low‐angle oblique and netted fractures .The main orientations of fractures interpreted by image logging data are nearly EW , and parallel with the current maximum principal stress direction .The fracture development in the volcanic reservoir is mainly affected by two factors :the tectonic position and rock type .The closer it is to the fault ;the bigger the structure curvature is ,and the greater the fractures are developed .They distributed zonally along the fault .The types of volcanic rocks impact the degree of fracture development .Through the image logging data analysis ,the fractures mainly developed in the intermediate‐acid volcanic lava and pyroclastic lava . The fracture density ,fracture dip ,and fracture porosity of single well can be quantitatively calculated . Combining with the method of amplitude versus azimuth (AVAZ ) in pre‐stack fracture detection technology , the fracture distribution in volcanic reservoir of Jiamuhe Formation can be predicted effectively and accurately .This study provides a reliable basis for a deployment of development well in a volcanic reservoir .