摘要
为科学评价水泥浆体系的抗窜能力,基于可模拟循环变载条件的水泥环抗窜能力试验装置,对不同候凝条件和不同配方的水泥浆体系抗窜能力进行试验分析。分析结果表明:在套管内压循环变载条件下,相同的水泥浆体系在不同的候凝条件、不同体系在相同候凝条件呈现出不同的抗窜能力,如在套管内外35 MPa压差下,配方1的水泥浆体系循环30轮次未出现破坏,而配方2的水泥浆体系在循环第5轮次产生了微裂纹和微环隙,而采用水泥浆性能系数法(SPN)和气/水窜测试仪分析,这两种体系的抗窜能力接近。因此,对于采用分段压裂进行储层改造的页岩油气井,增加多轮次变载条件下水泥环抗窜能力评价,有助于设计出更合理的水泥浆体系,选取更科学的施工参数。
In order to scientifically evaluate the anti-channeling ability of cement slurry system,a test device for anti-channeling ability of cement sheath based on simulated cyclic variable load conditions was developed.The test device was used to test and analyze the anti-channeling ability of cement slurry systems with different setting conditions and different formulations.The results show that under the condition of cyclic variable load of casing internal pressure,the same cement slurry system presents different anti-channeling ability under different setting conditions,and different cement slurry systems also present different anti-channeling abilities under the same setting conditions;e.g.,under the pressure difference of 35 MPa inside and outside the casing,the cement slurry system of Formula 1 has not been damaged for 30 cycles,while the cement slurry system of Formula 2 has produced micro cracks and micro annuluses at the fifth cycle,however,the analysis of cement slurry performance coefficient method and gas/water channeling tester shows that the anti-channeling ability of the two systems is close.Therefore,for shale oil and gas wells using staged fracturing to conduct reservoir stimulation,the evaluation on anti-channeling ability of cement sheath under multi-cycle variable load conditions is helpful to design a more reasonable cement slurry system and select more scientific operation parameters.
作者
吴彦先
晁明哲
王雪刚
闫旬国
钟守明
廖华林
Wu Yanxian;Chao Mingzhe;Wang Xuegang;Yan Xunguo;Zhong Shouming;Liao Hualin(Engineering Technology Research Institute,PetroChina Xinjiang Oilfield Company;CNPC Offshore Engineering Company Limited;Cementing Technology Service Center,Sinopec Shengli Petroleum Engineering Company;School of Petroleum Engineering,China University of Petroleum(Huadong))
出处
《石油机械》
北大核心
2021年第9期61-65,共5页
China Petroleum Machinery
基金
中石油重大工程技术专项“准噶尔南缘和玛湖等重点区块优快钻完井技术集成与试验”(2019F-33)。
关键词
水泥浆体系
抗窜能力
循环加载
评价试验
cement slurry system
anti-channeling ability
cyclic loading
evaluation test
作者简介
第一作者:吴彦先,工程师,生于1989年,2014年毕业于中国石油大学(华东)油气井工程专业,获硕士学位,现从事固井技术研究工作。地址:(834099)新疆克拉玛依市。电话:(0990)6888796。E-mail:wuyanxian@petrochina.com.cn;通信作者:廖华林,E-mail:liaohualin2003@126.com。
