北京凤河营热水储层的钻井液体系优化研究
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摘要
凤河营位于冀中坳陷处,具有丰富的地热资源。凤河营热水储层主要是蓟县系的雾迷山组,属于碳酸盐岩裂隙,岩溶型储层。在钻井过程中,热水储层出现了漏失、粘土膨胀坍塌等事故。在分析储层地质特征的基础上,对原钻井液体系的性能进行评价。实验表明原钻井液体系的失水造壁性和堵漏能力较差。根据储层的地质特征和出现事故的机理,优化原钻井液体系的性能。原钻井液体系中加入5%超细碳酸钙和5%氯化钾之后,钻井液体系的性能得到很大改善,具有良好的流变性、较强的抑制性、良好的堵漏能力和低滤失量。优化后的钻井液体系能减少凤河营地热储层的损害。
There are abundant geothermal resources in Fengheying which is located at the depression of Central Hebei,and the hot water reservoir is mainly JXW,belongs to carbonate crack and karst reservoirs.There are accidents such as leakage in hot water reservoir,clay swelling and collapse in the drilling process.Based on the analysis on the geological characteristics of the reservoir,the performance evaluation is made on the drilling fluid system.The experiment shows that the original drilling fluid system had poor wall building and leakage blocking properties.According to the geological characteristics of the reservoir and the mechanism of accidents,the performance of the original drilling fluid is optimized.By adding 5% superfine calcium carbonate and 5% potassium chloride into the original drilling fluid system,the performance of new drilling fluid is greatly improved with good rheology,strong inhibition,good blocking capacity and low filtration.The damage to Fengheying geothermal reservoir can be reduced by the optimized drilling fluid system.
There are abundant geothermal resources in Fengheying which is located at the depression of Central Hebei,and the hot water reservoir is mainly JXW,belongs to carbonate crack and karst reservoirs.There are accidents such as leakage in hot water reservoir,clay swelling and collapse in the drilling process.Based on the analysis on the geological characteristics of the reservoir,the performance evaluation is made on the drilling fluid system.The experiment shows that the original drilling fluid system had poor wall building and leakage blocking properties.According to the geological characteristics of the reservoir and the mechanism of accidents,the performance of the original drilling fluid is optimized.By adding 5% superfine calcium carbonate and 5% potassium chloride into the original drilling fluid system,the performance of new drilling fluid is greatly improved with good rheology,strong inhibition,good blocking capacity and low filtration.The damage to Fengheying geothermal reservoir can be reduced by the optimized drilling fluid system.
引文
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[3]余家仁,雷怀玉,刘趁花.试论海相碳酸盐岩储层发育的影响因素-以任丘油田雾迷山组为例[J].海相油气地质,1988,3(1):39-48.
[4]余家仁.华北潜山油藏碳酸盐岩储层研究[M].北京:石油工业出版社,1993:7-11.
[5]北京市地质矿产局.北京市区域地质志[M].北京:北京市地质矿产局,1991,12.
[6]林黎,赵苏民,阮传侠,等.天津地区深部蓟县系雾迷山组热储岩溶非均一性特征研究[J].现代地质,21(4):601-604.
[7]吴孔友,王雨洁,张瑾琳,等.冀中拗陷前第三系岩溶发育规律及其控制因素[J].海相油气地质,2010,15(4):2-3.
[8]惠会清,雷胜友.膨胀土膨胀机理及其改良(抑制)方法的研究综述[J].公路交通科技,2005,9(22):91.
[9]王业众,刘加杰,游利军,等.裂缝性储层漏失机理及控制技术进展[J].钻井液与完井液,2007,24(4):3-4.
[10]石得权,刘刚.钻孔孔壁坍塌掉块现象的分析研究及处理[J].西部探矿工程,2004,(7):124-125.
[11]王曼青.用水溶性高分子溶液抑制粘土膨胀[J].钻井液与完井液,2004,12(5):4-5.
[12]惠会清.化学法改良膨润土的试验研究[J].长安大学学报,2005,18(2):26.
[13]李志勇,鄢捷年,王友兵,等.保护储层钻井液优化设计新方法及其应用[J].钻采工艺,2006,29(2):85-87.
[14]赵东海,靳三江,杜明军.中原油田浅井泥浆技术的研究与应用[J].油田化学,1996,13(3):197-200.
[15]赵卫生,李玲.正交试验法优化乙烯基酯树脂增韧体系的研究[J].化工新型材料,2010,38(4):111-113.