【作者】 石云峰；

【导师】 方德庆； 牛世忠；

【作者基本信息】 东北石油大学 ， 地质工程， 2012， 硕士

【摘要】 红岗油田是松辽盆地南部最重要的产油区之一。红岗油田东邻松南最好的生油凹陷-大安凹陷，位于红岗阶地有利构造部位。红岗油田大208区浅层主要储集层黑帝庙油层，油藏类型以断层、微幅构造、岩性等隐蔽油气藏为主，储层主要以复杂的低渗透率的河流三角洲储层为主，储层横向连续性较差，油水分布极其复杂，开发稳产期短，综合含水率不断上升，层间矛盾日益突出，开采难度不断增大，面临这稳产增产的难题。为指导黑帝庙油层开发中后期调整工作，提高油藏开发效果，非常有必要进一步认识区块内部构造、油层分布特征、储层非均质性、剩余储量分布，为合理制定开发调整方案、正确选择开采方式提供依据。本论文针对红岗油田大208区黑帝庙油层物性差、厚度薄、非均质严重等地质特征，综合运用层序地层学、沉积学、石油地质学、储层地质学及油藏工程学等多学科的理论和方法，借助Petrel地质建模软件，应用随机建模的方法建立了红岗油田大208区黑帝庙油层三维精细地质模型，从而客观真实的反映了地质地质情况，为高效合理的开发该油藏奠定了基础。研究成果及主要认识有：通过高分辨率层序地层学方法和传统旋回厚度对比方法的有机结合，将研究区黑帝庙油层进一步细分为3个小层，10个单砂体，建立和完善了研究区单井及井间高分辨率层序地质格架，克服了以往小层对比中厚度控制、界限穿时的局限性，使小层对比划分更趋科学合理。采用取心相和测井相分析相结合的方法，将储层划分为水下分流河道微相、河口坝、远砂坝、前缘席状砂、水下溢岸砂、分支间湾等7种微相。其中水下分流河道和河口坝为主要的储集体。从沉积微相的演化及各时期沉积微相特征看来，研究区各微相呈自西向东展布，河道发育稳定，在每一期次的演化中有较好的继承性，H2-2a、H2-1a、H2-2b层砂岩发育较好，砂体基本连片，厚度较大，是主力储层。储层层间非均质性研究表明，黑帝庙油层发育3套稳定隔层，进而划分为3套开发层系。建立了单砂层夹层分布模型，对油层实际注水开发将具有一定的指导意义。平面非均质性研究表明，研究区所有单砂体均为强非均质性储层，结合各单砂体属性分布，发现所有单砂层均为低孔中渗层。表明研究区红岗非均质较强，对油田注水开发产生不利影响。在基础地质研究基础上，借助Petrel地质建模软件，建立了红岗油田大208区黑帝庙油层三维精细地质模型，对该油藏的构造、砂体展布、孔渗饱等属性参数空间分布特征有了更直接的认识，为下一步动态数值模拟奠定了基础，通过地质评价和开发区的储量计算验证该模型符合该区地质情况，可靠程度较高。更多还原

【Abstract】 Honggang oilfield is one of the most important oil-producing areas in Southern SongliaoBasin, which is located in the favorable structural position of Honggang terrace and on theeast of Da’an petroleum generative depression.There are different subtle reservoirs in theHeidimiao reservoir at Da208block whith is in the sallow layer of Songliao Basin, such asfault reservoirs, microtectonics reservoirs and lithologic reservoirs. The complex lowpermeability river delta reservoirs developed here have poor lateral continuity and complexfluid distribution. Short production plateau,high composite water cut, serious interformationalcontradiction and difficult development are recent problems. A better understanding of the theinternal properties, such as structures, reservoir distribution, reservoir anisopism andremaining reserves distribution, is important to enhancing the effect of the mid to latedevelopment of Heidimiao reservoir and the reasonable development program.For Heidimiao reservior’s features of poor geophysical properties, thin thickness andhigh anisotropism at Da208block of Honggang oilfield, the accurate3D geological model ofHeidimiao reservoir is built, synthetically depending on high resolution sequence stratigraphy,sedimentology, petroleum geology, reservoir geology and reservoir engineering etc., by meansof stochastic modeling with the software of PETREL geological modeling. So it is objectivelytruly to reflect the geological conditions of the underground, laying the foundation foreffectively developing the reservoir reasonable.The results of research and main view:Combining high resolution sequence stritigraphy with traditional method of stratacorrelating for using cyclothem thickness correlation, the Heidimiao reservoir is divided into3sublayers and10single sand bodies futher. The strata framewok between wells isestablished and accomplished. Overcoming the limit in the correlation of thickness control,interfaces traversing time, the sublayer correlation is more reasonable.Combining the facies of core with the well log facies,the reservoir is divided into7microfacies: subaqueous distributary channel facies, mouth bar facies, distal bar facies, frontsheet sand facies, overbank sand facies and distributary interchannel facies.Among thesemicrofacies, the sands of subaqueous ditributary channel and mouth bar are the main reservoirbodies. From the microfacies’ evolution features and the characteristics of microfacies in eachperiod, the microfacies are distributed from west to east. The sands of subaqueous distributarychannel are distributed in the west with high successiveness. Sands in the single sand bodies of H2-2a, H2-1a, H2-2b are developed, and the sands form a sheet with thick thickness, arethe main reservoirs.The findings of reservoir interlayer anisotropism show that Heidimiao reservoir developsthree stable interlayaers and can be divided into three layer series of development. The singlesand bodies’ intercalations distribution model is established, which will have a guiding role inreservior’s waterflood development. Plane anisotropism study shows that all single sandbodies are strong anisotropism reservoir. Combining all single sand bodies geophysicalproperties, find all single sand bodies have low porosity and middle permeability. The stronganisotropism has high impact on the waterflood development.After the study of geological modeling theories, methods and softwares, set up the3Dgeological model of Heidimiao reservoir at Da208block in Honggang oilfield by usingPETREL, reveal the3D distribution character of the research area’ structure, sand body,porosity, permeability, and oil saturation, and become the base of dynamic digital modeling inthe tuture. The3D geological model is in line with the area’s geological conditions and hashigher reliability, by the validation of geological evaluation and reserve calculation.更多还原