Progress and development directions of stimulation techniques for ultra-deep oil and gas reservoirs  

作　　者：LEI Qun XU Yun YANG Zhanwei CAI Bo WANG Xin ZHOU Lang LIU Huifeng XU Minjie WANG Liwei Li Shuai 

机构地区：[1]PetroChina Research Institute of Petroleum Exploration&Development,Beijing 100083,China [2]PetroChina Southwest Oil&Gasfield Company,Chengdu 610051,China [3]PetroChina Tarim Oilfield Company,Korla 841000,China

出　　处：《Petroleum Exploration and Development》2021年第1期221-231,共11页石油勘探与开发（英文版）

基　　金：Supported by the China National Science and Technology Major Project(2016ZX05023);Petro China Science and Technology Major Project(2018E-1809)。

摘　　要：By reviewing the development history of stimulation techniques for deep/ultra-deep oil and gas reservoirs,the new progress in this field in China and abroad has been summed up,including deeper understanding on formation mechanisms of fracture network in deep/ultra-deep oil and gas reservoir,performance improvement of fracturing fluid materials,fine stratification of ultra-deep vertical wells,and mature staged multi-cluster fracturing technique for ultra-deep and highly deviated wells/horizontal wells.In light of the exploration and development trend of ultra-deep oil and gas reservoirs in China,the requirements and technical difficulties in ultra-deep oil and gas reservoir stimulation are discussed:(1)The research and application of integrated geological engineering technology is difficult.(2)The requirements on fracturing materials for stimulation are high.(3)It is difficult to further improve the production in vertical profile of the ultra-deep and hugely thick reservoirs.(4)The requirements on tools and supporting high-pressure equipment on the ground for stimulation are high.(5)It is difficult to achieve efficient stimulation of ultra-deep,high-temperature and high-pressure wells.(6)It is difficult to monitor directly the reservoir stimulation and evaluate the stimulation effect accurately after stimulation.In line with the complex geological characteristics of ultra-deep oil and gas reservoirs in China,seven technical development directions are proposed:(1)To establish systematic new techniques for basic research and evaluation experiments;(2)to strengthen geological research and improve the operational mechanism of integrating geological research and engineering operation;(3)to develop high-efficiency fracturing materials for ultra-deep reservoirs;(4)to research separated layer fracturing technology for ultra-deep and hugely thick reservoirs;(5)to explore fracture-control stimulation technology for ultra-deep horizontal well;(6)to develop direct monitoring technology for hydraulic fractures in ultra-deep oi

关 键 词：ultra-deep oil and gas reservoir high temperature and high pressure reservoir stimulation technical status technical difficulties development direction 

分 类 号：TE357[石油与天然气工程—油气田开发工程]