三叠系油藏裂缝识别技术研究及应用

Research and application of triassic reservoir crack recognition technology

长庆三叠系油藏都为特低渗透油藏,为了改善低孔低渗油藏开发效果,通常对区块采取整体压裂,但该技术是一把"双刃剑",压裂之后,地层存在天然裂缝继续扩张以及产生新的次生裂缝,虽然能够提升单井产量,但同时也可产生油井产量递减快、注水水窜等许多新的问题,影响了油田的稳产,因此从裂缝识别技术研究出发,寻找区块的裂缝发育特征,提出下步裂缝治理技术和提高区块开发效果技术,为油藏高效开发提供技术支持。

Changqing oil fild are as low permeability reservoir,in order to improve the low porosity and low permeability reservoir development,usually on the block to take the overall fracturing,but the technology is a ＂double-edged sword,＂ after fracturing,There is a natural crack formation continued expansion and the generation of secondary cracks,is able to support single well production,but also produces oil production decline rapidly,injection water of channeling,and many new problems,affecting the basis of production stability,so This departure from the crack identification technique to find the block fracture characteristics of cracks in the next step proposed treatment technology and improve the development effect of block technology for reservoir development to provide efficient technical support.