定边A区长X致密储层蓄能压裂开发技术探讨

Discussion on energy storage fracturing technology of Chang X tight reservoir in block A of Dingbian area

定边地区致密油资源丰富,但孔渗条件差,油井无自然产能,常规压裂产能低、稳产差,难以达到经济有效动用;本文针对定边致密储层特征,立足"增大改造体积、补充地层能量",探索形成了蓄能式体积压裂配套技术。现场应用效果明显;提高了致密油初产和长期稳产水平,其中彭b、姚c井压后试采产量分别为4.5 t和6.0 t,产量为同区块直井常规压裂投产的3~5倍。

Dingbian area is rich in tight oil resources, but its porosity and permeability conditions are poor, oil wells have no natural production capacity, conventional fracturing production capacity is low and stable production is poor, so it is difficult to achieve economic and effective development. According to the characteristics of Dingbian tight reservoir, based on "increasing the reconstruction volume and supplementing the formation energy", the exploration cable has formed the matching technology of energy storage volume fracturing. The field application effect is obvious.The initial production and long-term stable production level of tight oil are improved, in which the trial production output of Peng b and Yao c well after killing is 4.5 t and 6.0 t respectively, and the production is 3~5 times of the conventional fracturing production of straight wells in the same block.