摘要
胡尖山油田安83长7致密油藏由于储层致密,启动压力梯度高,常规注水开发压力传递较慢,有效驱替系统难建立,加之存在裂缝等优势渗流通道,整体表现出注水不见效、见效即见水的水驱矛盾,开发效果差。近年来因地制宜,对定向井区重点开展周期注水、空气泡沫驱油、体积压裂不返排闷井扩压等工作,对水平井重点开展吞吐采油、周期注水、异步注采等工作,不断探索地层能量补充方式,均取得一定效果及认识,但总体来说基于毛管吸吮作用和压差机理的按一定注入周期补充能量的渗析采油法对该区致密油开发具有深远意义,在充分结合改造强度、缝网形态等参数情况下实施效果较好,后期可持续扩大实施,并探索改善驱油介质等新方法。
Because of high starting pressure gradient of An 83 Chang 7 tight oil reservoir of Hujianshan oilfield, pressure pass slowly in conventional water flooding, the effective displacement system difficult to establish, in addition there are cracks preponderance flow path,the whole show non effect of water injection, water flooding effect to see contradictions, poor development effect. In recent years, adjust measures to local conditions, to focus on the development of asynchronous injection in directional well area, air foam flooding, volume fracturing flowback stuffy well diffuser work, focus on the development of horizontal well stimulation, periodic flooding, asynchronous injection production and other work, and continuously explore the formation energy supplement, have made certain effect and understanding, but the overall it is based on the capillary sucking and differential pressure mechanism by dialysis oil extraction method must add energy injection cycle of dense oil development in this area has far-reaching significance, fracture network morphology parameters under the condition of the implementation of the effect is good in fully integrated reform intensity and later expanded, sustainable implementation, and explore new methods to improve flooding oil medium etc.
出处
《石油化工应用》
CAS
2015年第3期58-62,共5页
Petrochemical Industry Application
关键词
安83长7
致密油
吞吐采油
周期注水
异步注采
An 83 Chang 7 work area
tight oil reservoir
stimulation
periodic flooding
asynchronous injection
