环江油田长8储层改造工艺技术适用性分析

Analysis on the Applicability of Innovatory Technology at Chang 8 Storage Layer of Huanjiang Oilfields

环江地区地表水矿化度高压裂液体难以配制,长8储层厚度大,物性差且泥质含量高。通过多项地应力和岩石力学测试,引入体积压裂技术,阐述了定向射孔多缝压裂和注水井酸化等方面储层改造技术的适用性,并强调了施工操作的关键工序,指明了提高单井产量的方向。为了缩短建井周期、增强新工艺新技术推广应用,推行了联作工艺规避井下风险,提高新井时率,从而实现了深层位的高效开发。

Surface water in Huanjiang area has the high salinity, so it is difficult to make up fracturing liquid, especially for Chang 8 storage layer, which has much thickness, poor property and high shale content. Through the tests of multiple ground stresses and rock mechanics, the volume fracturing technology is introduced to this area. Then an explanation centers around the applicability of storage innovation technology in the aspects of oriented perforating multiple-slit fracturing and water-injection well acidification. Meanwhile, the key sequences of construction are emphasized, followed by the presentation of how to improve the output of single well. In order to shorten the period of well construction, strengthen the popularization and application of new technologies, interactive technology is implemented so as to prevent the downhole risk and raise the hour rate of new wells, and thus realize the high effective development of deep layer.