鄂尔多斯盆地致密油藏水平井开发井网论证  

DEMONSTRATION OF THE WELL PATTERN OF HORIZONTAL WELLS DEVELOPMENT IN ORDOS TIGHT RESERVOIR

作　　者：曹宝格[1] 韩永林[2] 余永进[2] 孟令涛[3] 

机构地区：[1]西安石油大学石油工程学院 [2]长庆油田分公司采油二厂 [3]长庆油田分公司勘探部

出　　处：《钻采工艺》2016年第4期53-56,4-5,共4页Drilling & Production Technology

基　　金：国家自然科学基金项目"热电纳米材料与高分子材料对清洁压裂液的协同增效机理研究"(编号:51304159)

摘　　要：鄂尔多斯盆地致密油藏资源丰富,勘探开发潜力大,其特点适合采用水平井体积压裂法来开采。文章以华池-南梁地区山156井区长6致密油藏为例,对其水平井开发井网进行论证。开发实践证实,当采用水平井体积压裂法开采长6致密油藏时,初期单井产量高,增产倍数大。由于储层中存在着大量的缝网结构,在采用水平井开采长6致密油藏时,注水井排方向与裂缝方向平行,且水平段方向与裂缝方向垂直时,水驱波及体积大,开发效果好;当采用直井注水＋水平井采油的开采模式时,合理的水平段长度为600~800 m,此时,采用七点法注采井网的开发效果好;七点法井网的合理井距为700~800 m、排距为100~150 m。文章得出的结论可以为鄂尔多斯盆地致密油藏水平井开发提供技术参数。The tight oil resource is rich in Ordos Basin,and the potential of exploration and development is great.According to the reservoir characteristics,the volume-fractured horizontal well was suitable to increase the reservoir production.Taking Chang-6 reservoir of Shan 156 borefield in Ordos Basin as an example,the well pattern used in the horizontal wells development was demonstrated.The development practice has proved that,the initial production of single well was high,and the stimulation ratio was big when using volume fracturing method exploited the Chang-6 reservoir.Because a large number of fracture network structure exists in the reservoir,when theChang-6 tight oil reservoir was exploited by using the horizontal well,the direction of the water injection well row was parallel to the direction of cracks,and the direction of the horizontal section was vertical to the direction of crack,the swept volume of water flooding was larger and the development effect was better.When the development pattern of vertical wells water injection and horizontal well production oil was adopted,the reasonable horizontal length was 600 ~ 800 m,at this time,the single well output of the seven-spot water flooding pattern was higher than the one of the five-spot water flooding pattern,the pressure maintenance level was also higher.The reasonable well spacing was700 ~ 800 m,and the reasonable row spacing was 100 ~ 150 m when using the seven-spot water flooding pattern.The conclusion of this paper could provide technical parameters for the horizontal well development of tight oil reservoir.

关 键 词：致密油 水平井 井排方向 裂缝方向 水平段方向 

分 类 号：TE357[石油与天然气工程—油气田开发工程]