川东地区低效油气田勘探开发难点及对策

我国天然气工业处于快速发展阶段，加快低效油气田勘探开发的进程，有效地挖掘报废井和低渗区块的资源潜力，对促进川渝地区油气事业发展有重要的推动作用。文章分析了川东地区低效油气田勘探开发存在的难点：①报废井、低产井、低压井、边远井存在很多不利因素；②浅层资料缺乏；③低渗区的难动用储量开采难度大；④后备资源量缺乏，制约着低效气井上产稳产；⑤单井直供用户，对气井产能伤害严重；⑥气井生产受气质、地面工艺制约，这影响气井正常生产。针对不同类型低效井的具体情况，提出了化排、单井增压等不同开采方式和工艺技术措施，提出了加大对低渗储量开发技术攻关、提高低渗储量动用程度的技术手段和工艺措施，取得了开发低效气田、低渗区块的有效方法。

Analysis on Problems Obstructive to Exploration & Development of Low-efficiency Oil & Gas Fields in East Sichuan

China's natural gas industry is now in rapid growth. Expediting low-efficiency oil & gas fields exploration and development, re-producing abandoned wells and exploring low- permeability blocks for the potential resources would significantly promote the oil industry growth in Sichuan and Chongqing Area. The paper analyzes the existing problems obstructive to exploration and development of low efficiency oil & gas fields in East Sichuan, including: 1) unfavorable conditions of abandoned, low yield, low pressure, remote wells; 2) shallow formation data inadequacy; 3) technical difficulty in exploiting non-producing reserve in low permeability block; 4)the low-efficiency gas well restricted for lack of the backup resources; 5) severe damage to gas well productivity caused by wellhead to the users direct supply; and 6) gas well production restrained by gas quality and surface production technology. It is recommended different production method and technical measures including chemical displacement and single well simulation specific to different types of low-efficiency wells, calls for enhancing research and resolution of technical difficulty in low-permeability reserve production, recommends technical and production measures for increasing production of low-permeability reserves and summarizes effective method for developing low-efficiency gas fields and low-permeability blocks.