【摘要】 密井网区单河道砂体定量表征可为油田井网部署及注采调整提供地质依据。以胡尖山油田胡154密井网区长4+521小层为例,对研究区广泛发育的三角洲前缘水下分流河道复合砂体进行精细刻画,将其解剖成单一期次河道砂体,获得了单河道砂体的定量地质知识。研究取得如下认识:确立了单河道砂体边界的3种垂向和4种侧向识别标志。单河道砂体几何形态分为细条带状、宽条带状和交织条带状3种,单河道砂体宽度介于150～560m之间,厚度介于1.5～5.4m之间,宽厚比介于22～121之间;宽度与厚度呈对数关系,相关系数达0.854 1,相关性较好。根据河道发育的期次不同,单河道砂体接触样式可分为孤立式、叠加式、叠切式3种垂向接触样式和分离式、对接式、侧切式3种平面接触样式。更多还原

【Abstract】 The quantitative characterization of single channel sandbody in dense well network area can provide geological basis for oilfield well pattern arrangement and injection production adjustment.Taking Chang-4+521 layers in dense well network area of Hu154 wellblock of Hujianshan oilfield as an example,a detailed description of subaqueous distributary channel composite sandbodies in the delta front of the study area was carried out,which was dissected into a single channel sandbody,and the quantitative geological knowledge of the single channel sandbody was obtained.The results were described as follows:three vertical marks and four lateral marks of the boundary of single channel sandbody were established.The geometric shapes of single channel sandbody were divided into three shapes such as thin stripped shape,wide stripped shape and intertwined stripped shape.The width of single channel sandbody is between 150 and 560 m,the thickness is between 1.5 and 5.4 m,and the ratio of width to thickness is between 22～121.The relationship between width and thickness is logarithmic,the correlation coefficient is 0.854 1,and the correlation is good.According to the different stages of channel development,the contact styles of single channel sandbody can be summarized as three vertical contact styles and three lateral contact styles.Three vertical contact styles include isolated-type,overlap-type and overlay cutting type.Three lateral contact styles include seperrated-type,butt-joint type and side shear type.更多还原