Study on the Performance of New Ultra-high Temperature High Density Oil Base Mud Thinners
-
摘要: 针对高温高密度油基钻井液黏度升高的问题，合成了3种降黏剂A、B和C，降黏剂A为缩聚脂肪酸，由十二羟基硬脂酸、聚羟基硬脂酸、硬脂酸、十二羟基硬脂酸与硬脂酸反应后的产物和硬脂酸的均聚物中一种或几种的组合共聚得到，降黏剂B是由脂肪酸或油与聚胺在100~200℃反应，再与马来酸、酸酐在80~150℃反应，用40%的油醇、脂肪酸或缩聚脂肪酸稀释得到，降黏剂C是由缩聚脂肪酸与醇铵、聚氨反应得到的衍生物，对他们的作用机理进行了探讨。以高密度油基钻井液（2.2 g/cm3）为基浆，加入劣质土污染或用重晶石将密度提高到2.4 g/cm3，考察3种降黏剂在此条件下的降黏效果。研究结果表明，降黏剂A和降黏剂C可以很好地降低由于劣质固相引起的流变性能超标，可以提高油基钻井液的重复使用次数，降低成本；降黏剂B能很好地调节由加重剂引起的高密度钻井液的增黏，降低对泵压的要求；降黏效率可达77%，抗温达225℃。Abstract: Three thinners, A, B and C have been synthesized to deal with extra viscosity of high temperature high density oil base drilling fluids. Thinner A, a condensation polymerized fatty acid, was obtained by copolymerizing one or more raw materials such as dodecahydroxyl stearic acid, polyhydroxy stearic acid, stearic acid, and the homopolymer of the product of dodecahydroxyl stearic acid and stearic acid with stearic acid. Thinner B was obtained by reacting the product of fatty acid or fat and polyamine at 100℃-200℃ with maleic acid and maleic acid anhydride at 80℃-150℃, and then dispersed the product with 40% oleyl alcohol, fatty acid or condensation polymerized fatty acid. Thinner C was a derivative from the reaction product of condensation polymerized fatty acid, alcohol amine and polyamine. The working mechanisms of these thinners are discussed in this paper. Added poor quality clay to contaminate or added barite to weight a high density (2.2 g/cm3) oil base mud to 2.4 g/cm3, then treated the weighted mud with three thinners to test their ability to reduce viscosity. It was found that the thinner A and the thinner C both were able to control the rheology of mud caused by the addition of poor quality clays within predetermined range, and the oil base mud can thus be reused for many more times, thereby reducing mud cost. The thinner B was able to reduce mud viscosity caused by the addition of barite, hence the pump pressure. The thinner B has thinning efficiency of 77%, and functions properly at 225℃.
-
[1] CAENN R,DARLEY H C H,GRAY G R.Composition and properties of drilling and completion fluids[M].Gulf Professional Publishing,2011. [2] NEFF J M,MCKELVIE S,AYERS R C.Environmental impacts of synthetic based drilling fluids[M].Minerals Management Service Gulf of Mexico OCS Region,2000. [3] MASKARY S S,ABDUL HALIM A,DAHCHE A, et al.Sustainability in re-cycling drilling fluids between rigs[C]//Abu Dhabi International Petroleum Exhibition and Conference.Society of Petroleum Engineers,2014. [4] 王中华. 国内外油基钻井液研究与应用进展[J]. 断块油气田,2011,18(4):533-537.WANG Zhonghua.Research and application progress of oil-based drilling fluid at home and abroad[J].Fault-Block Oil & Gas Field,2011,18(4):533-537. [5] 覃勇,蒋官澄,邓正强,等.抗高温油基钻井液主乳化剂的合成与评价[J].钻井液与完井液,2016,33(1):6-10.QIN Yong,JIANG Guancheng,DENG Zhengqiang, et al.Synthesis and evaluation of aprimary emulsifir for high temperature oil basedrilling fluid[J].Drilling Fluid & Completion Fluid,2016,33(1):6-10. [6] 李建成,杨鹏,关键,等. 新型全油基钻井液体系[J]. 石油勘探与开发,2014,41(4):490-494.LI Jiancheng,YANG Peng,GUAN Jian,et al.A new type of whole oil-based drilling fluid[J].Petroleum Exploration and Development,2014,41(4):490-494. [7] MUELLER H,KIRSNER J,BURROWS K.Thinners for invert emulsions:US Patent 7435706[P].2008-10-14. [8] 宣扬,蒋官澄,李颖颖,等.基于仿生技术的强固壁型钻井液体系[J].石油勘探与开发,2013,40(4):497-501.XUAN Yang,JIANG Guancheng,Li Yingying,et al. A biomimetic drilling fluid for wellbore strengthening[J]. Petroleum Exploration and Development,2013,40(4):497-501. [9] 王先洲,邓增库,夏景刚,等. 苏76-1-20H井钻井液技术[J]. 钻井液与完井液,2012,29(5):50-53.WANG Xianzhou,DENG Zengku,XIA Jinggang,et al. The fluid applications in well Su 76-1-20H[J].Drilling Fluid & Completion Fluid,2012,29(5):50-53. -
点击查看大图
计量
- 文章访问数: 860
- HTML全文浏览量: 235
- PDF下载量: 330
- 被引次数: 0
下载:
