摘要
大型复合砂体在平面上、垂向上切叠十分严重,表现为大面积分布或宽带状分布的厚层砂体,在岩心上表现为块状厚层砂岩,在测井曲线上呈厚层箱型特征。由于厚层砂体内部标志层界限不明显,横向对比十分困难。针对这一问题,以厚油层普遍发育的萨尔图油田南部X开发区块葡Ⅰ段1至4号层为例,在充分研究、认识研究区地层、沉积特征基础上,运用沉积学、高分辨率层序地层学,按成因单砂体类型及特征,提出等比例厚度对比和旋回对比两种方法,对该区葡Ⅰ段1至4层进行精细对比,解决了大型复合砂体各沉积单元界限难以确定的问题。
The laminar shear phenomenon of the large compound sand body is extremely serious in horizontal or vertical directions,which shows that thick sand body distributes in large area or in wide string,the display in core is the thick sandstone in blocks,the response characteristics of well logs are in thick box. As the limit of internal reference lamina isn' t clear,the horizontal correlation is very difficult. In view of this problem,the layers 1-4 of member Pu Ⅰof X development block in the south of Saertu Oilfield was taken as examples,in which the thick oil zones are generally developed. On the basis of fully researching and cognizing strata and sedimentary features of this block,making use of sedimentology and high resolution sequence stratigraphy,according to the type and characteristics of single sand body,the two methods of proportional thickness correlation and cycle correlation were put forward,which were used to make fine correlation to layers 1-4 of member PuⅠof this block to solve the problem of determining the limits of each sedimentary units of large compound sand body difficultly.
出处
《录井工程》
2010年第4期65-69,共5页
Mud Logging Engineering
关键词
复合砂体
沉积单元
细分对比
方法
compound sand body,sedimentary unit,fine correlation,method
