透镜状薄层底水油藏水平井开采技术研究——以陆梁油田为例  

Study on Horizontal-Well Production Technologies for Lenticular Thin Reservoirs with Bottom Water——An example of Luliang oil field in Junggar basin

作　　者：石国新[1,2] 霍进[2] 路建国[2] 石军[2] 谭建华[2] 张毅[2] 范光旭[2] 

机构地区：[1]西南石油大学石油工程学院,成都610500 [2]中国石油新疆油田分公司陆梁油田作业区,新疆克拉玛依834000

出　　处：《新疆石油地质》2009年第6期754-757,共4页Xinjiang Petroleum Geology

摘　　要：陆梁油田陆9井区呼图壁河组油藏为特殊的低幅度薄层边底水油藏。未动用储量,大多分布在透镜状薄层带边底水的小砂体中,油层平均厚度小于3 m,油水关系复杂,直井开采难度大,效益差。通过精细解剖含油单砂体、细分流动单元、准确识别纯油层和低阻油水同层等,开展了水平井开采先导试验,进行了精确的井眼轨迹控制、水平段合理长度、布井方式与注采井距等研究,初步形成了一套适合这类油藏的水平井开采技术,对油层跨度800 m范围内不同油水关系、不同地质特征的未动用储量,整体优化部署水平井104口,建产能40×104 t,储量动用程度由51.8%提高到82.6%.The Hutubihe reservoir in Wellblock Lu-9 in Luliang oil field is a thin and low-amplitude reservoir with bottom water. Cun＇ently non-producing reserves in it controlled by six well patterns for development of this Wellblock Lu-9 are most distributed in small sand bodies with edge and bottom water in lenticular thin layers. The average thickness of oil beds is less than 3 m, featuring complicated water-oil contact relations and difficulties for production by vertical wells as well as poor economic benefits. The horizontal well production technology available has not been applied to this kind of reservoirs at home and abroad. This paper presents the pilot test of horizontal well production of it by detailed reservoir description, dissection of single oil-bearing sand bodies, classification of flow units and identification of net pay zone and low-resistivity oil-water zones. Meanwhile, the well track control, reasonable length of horizontal section, well pattern and injection-production well spacing are studied. Thus, a set of horizontal well production technologies is preliminarily established for this kind of reservoirs. On the basis of the optimization of non-producing reserves of different oil-water contact relationships and different geological characteristics in the range of 800 m span, 104 horizontal wells are placed with the productivity of 40×10^4 t. The producing extent of reserves is improved from 51.8% to 82.6%.

关 键 词：陆9井区 薄层底水油藏 水平井 水脊 开采技术 

分 类 号：TE132[石油与天然气工程—油气勘探]