中国煤炭地质
中國煤炭地質
중국매탄지질
Coal Geology of China
2015年
9期
55-58
,共4页
钾盐钻探%卤水钻井液%配制%性能评价%青海柴达木盆地
鉀鹽鑽探%滷水鑽井液%配製%性能評價%青海柴達木盆地
갑염찬탐%서수찬정액%배제%성능평개%청해시체목분지
sylvinite strata drilling%salt brine drilling fluid%preparation%performance assessment%Qaidam Basin,Qinghai
在青海柴达木盆地卤水钾盐钻探中，钻遇地层为新近系干盐湖沉积地层，上部孔段岩性是粘土层，其特征是水敏性强，在施工中产生易缩径、造浆，下部孔段为砂砾碎屑岩，孔壁易出现掉块、坍塌等现象，给钻探施工带了困难。针对钻遇地层特点，采取先在室内进行卤水钻井液实验，选择出适合的钻井液配方，再到野外现场应用试验的研究方法。为了评价卤水钻井液的性能，选择淡水防塌钻井液、不饱和盐水钻井液、饱和盐水钻井液、卤水钻井液四种不同种类的钻井液进行钻井液抑制性、泥皮质量和润滑性能对比测试，结果表明，卤水钻井液性能优于其他类型钻井液。该钻井液的研制，有效保持了孔壁稳定和较高的岩心采取率，并取得了较好的经济技术效果。
在青海柴達木盆地滷水鉀鹽鑽探中，鑽遇地層為新近繫榦鹽湖沉積地層，上部孔段巖性是粘土層，其特徵是水敏性彊，在施工中產生易縮徑、造漿，下部孔段為砂礫碎屑巖，孔壁易齣現掉塊、坍塌等現象，給鑽探施工帶瞭睏難。針對鑽遇地層特點，採取先在室內進行滷水鑽井液實驗，選擇齣適閤的鑽井液配方，再到野外現場應用試驗的研究方法。為瞭評價滷水鑽井液的性能，選擇淡水防塌鑽井液、不飽和鹽水鑽井液、飽和鹽水鑽井液、滷水鑽井液四種不同種類的鑽井液進行鑽井液抑製性、泥皮質量和潤滑性能對比測試，結果錶明，滷水鑽井液性能優于其他類型鑽井液。該鑽井液的研製，有效保持瞭孔壁穩定和較高的巖心採取率，併取得瞭較好的經濟技術效果。
재청해시체목분지서수갑염찬탐중，찬우지층위신근계간염호침적지층，상부공단암성시점토층，기특정시수민성강，재시공중산생역축경、조장，하부공단위사력쇄설암，공벽역출현도괴、담탑등현상，급찬탐시공대료곤난。침대찬우지층특점，채취선재실내진행서수찬정액실험，선택출괄합적찬정액배방，재도야외현장응용시험적연구방법。위료평개서수찬정액적성능，선택담수방탑찬정액、불포화염수찬정액、포화염수찬정액、서수찬정액사충불동충류적찬정액진행찬정액억제성、니피질량화윤활성능대비측시，결과표명，서수찬정액성능우우기타류형찬정액。해찬정액적연제，유효보지료공벽은정화교고적암심채취솔，병취득료교호적경제기술효과。
In the drilling of halogenic sylvinite in Qaidam Basin, Qinghai, intersected strata have Neogene playa sedimentary layers. The upper part is clay with strong water sensitivity, and easy to cause hole shrinkage and slurrying;lower part is sandy gravel clastic rocks, easy to cause wall sloughing, collapsing, thus have brought difficulties in drilling operation. In allusion to intersected strata char?acteristics, using a research method of to test salt brine drilling fluid in laboratory first, select adapted drilling fluid formula, then apply?ing the result on the spot. To assess drilling fluid performances, fresh water collapsing prevention, unsaturated salt water, saturated salt water and salt brine four kinds of drilling fluids to carry out their rejection capability, mud-cake quality and lubrification comparison tests. The result has shown that the performance of salt brine drilling fluid is superior to other kinds of drilling fluid. The preparation of salt brine drilling fluid has kept borehole wall stability and higher rock core recovery effectively, and obtained better economical and technological results.
