深水高温高压气田双层套管射孔技术可行性模拟试验  

Simulation test on the feasibility of double-layer casing perforation technology in deepwater high-temperature and high-pressure gas field

作　　者：邱浩 文敏 曹砚锋 侯泽宁 马楠 韩斐 毕刚[3] QIU Hao;WEN Min;CAO Yanfeng;HOU Zening;MA Nan;HAN Fei;BI Gang(CNOOC Research Institute Ltd.,Beijing 100028,China;National Key Laboratory of Offshore Oil and Gas Exploitation,Beijing 102209,China;College of Petroleum Engineering of Xi'an Shiyou University,Xi'an,Shaanxi 710065,China)

机构地区：[1]中海油研究总院有限责任公司,北京100028 [2]海洋油气高效开发全国重点实验室,北京102209 [3]西安石油大学石油工程学院,陕西西安710065

出　　处：《中国海上油气》2023年第6期124-133,共10页China Offshore Oil and Gas

基　　金：国家自然科学基金项目“深水油气钻采井筒压力控制基础研究(编号:51734010)”“基于离散裂缝网络的致密油藏体积压裂水平井渗吸产能研究(编号:52104033)”部分研究成果。

摘　　要：陵水25-1气田天然气资源丰富,该区块深水、高温、高压并存,完井作业难度大,若采用单层套管射孔完井,不能保障所有气组高效开采,亟需开展双层套管射孔工艺专项技术攻关。双层套管射孔技术可行性模拟试验设计通过高温高压双层套管穿透性能简化试验和常温常压双层套管射孔地面全尺寸试验两部分进行测试和验证射孔作业相关参数。基于高温高压工况双层套管射孔模拟试验,确定了高温高压对射孔孔径和孔眼深度的影响规律,获得了高温高压工况下孔深的折减系数;基于双层套管射孔地面全尺寸模拟试验,研究了不同工况下射孔穿透性规律,建立了炸药量与穿深/孔径的量化关系,并进行了射孔孔径差异影响因素的量化分析。通过高温高压折减系数,分析了双层套管射孔效率量化影响规律,模拟试验证明了双层套管射孔的可行性,对陵水25-1气田高效开采具有借鉴意义。LS25-1 gas field is rich in natural gas resource and the block is characterized by deepwater,high-temperature and high-pressure coexist in the block,which makes well completion challenging.If single-layer casing perforation completion is adopted,it cannot guarantee the efficient exploitation of all gas groups.It is imperative to carry out special technical research on double-layer casing perforation technology.In view of this,the simulation test design of the feasibility of double-layer casing perforation technology was designed to test and verify the relevant parameters of perforating operation through two parts:the simplified test of the penetration performance of the double-layer casing at high temperature and pressure and the surface full-size test of the double-layer casing perforating at normal temperature and pressure.The influence law of high-temperature and high-pressure conditions on perforation aperture and hole depth was determined,and the reduction factor of hole depth was obtained based on the simulation test of double-layer casing perforation under high-temperature and high-pressure conditions.On the other hand,the perforation penetration law under different working conditions was studied,the quantitative relationship between the explosive amount and penetration depth/aperture was established,and the quantitative analysis of the factors affecting the difference of perforation aperture was carried out based on the surface full-size simulation test of double-layer casing perforation.Through the reduction coefficient of high-temperature and high-pressure,the quantitative influence law of perforation efficiency of double-layer casing was analyzed.The simulation test proves the feasibility of double-layer casing perforation,which has a reference significance for the efficient exploitation of LS25-1 gas field.

关 键 词：深水气田 高温高压 双层套管射孔 陵水25-1气田 全尺寸试验 

分 类 号：TE257.1[石油与天然气工程—油气井工程]