需要金幣： 1000 個(gè)金幣 |
資料包括：完整論文 |  |
 |
| 轉(zhuǎn)換比率：金額 X 10=金幣數(shù)量， 例100元=1000金幣 | 論文字?jǐn)?shù)：19489 |  | |
| 折扣與優(yōu)惠：團(tuán)購(gòu)最低可5折優(yōu)惠 - 了解詳情 | 論文格式：Word格式(*.doc) |  |
摘 要：在鉆井工程中，鉆遇地層的75%以上是泥頁(yè)巖地層，而由它引起的井眼不穩(wěn)定問(wèn)題超過(guò)了90%?？偨Y(jié)井壁穩(wěn)定性研究現(xiàn)狀，了解頁(yè)巖膨脹機(jī)理，從鉆井液的不同pH值和不同礦化度兩個(gè)性能的角度分析對(duì)泥頁(yè)巖的抑制能力。由于井壁穩(wěn)定問(wèn)題是一個(gè)復(fù)雜的世界性難題，它涉及到多學(xué)科領(lǐng)域，受多種主、客觀因素的影響，所以本文在不考慮力學(xué)和溫度壓力效應(yīng)的情況下僅從化學(xué)角度對(duì)蘇北區(qū)塊地層的井壁穩(wěn)定性問(wèn)題作一簡(jiǎn)單探討。由于泥頁(yè)巖中含有水敏性黏土礦物，與鉆井液接觸時(shí)，泥頁(yè)巖與鉆井液相互作用，產(chǎn)生水化膨脹。通過(guò)頁(yè)巖膨脹實(shí)驗(yàn)得出不同礦化度和不同pH值對(duì)頁(yè)巖膨脹的抑制效果，總結(jié)實(shí)驗(yàn)結(jié)果，得出氫氧根明顯促進(jìn)泥頁(yè)巖中粘土水化分散。氯化鈉和氯化鉀都是隨著濃度的增加而對(duì)頁(yè)巖的抑制性增強(qiáng)。濃度在2%-10%氯化鈣溶液的頁(yè)巖膨脹量差別不大，但隨著濃度的進(jìn)一步增大抑制性會(huì)有明顯的提高。 關(guān)鍵詞：井壁穩(wěn)定性；頁(yè)巖膨脹；鉆井液性能；pH值；礦化度
Abstract：In drilling engineering, 75% of the drilled formation is a shale formation, wellbore instability problems caused by it are more than 90%. Summary the research status of the wellbore stability ,and shale expansion mechanism,from the perspective of drilling fluids of different pH values and different degree of mineralization analysis the shale inhibition.Wellbore stability problems is a complex worldwide problem,it involves a multidisciplinary field and influenced by a variety of main objective factors,so this paper without considering mechanics and temperature and pressure effect ,only considering chemical ,take a simple discussion about the wellbore stability from the Angle of northern jiangsu province. Due to shale contains water-sensitive clay minerals and when it contacts with drilling fluids, shale and drilling fluids interact and lead to hydration expansion. Through the shale inflation experiment, it indicates that the effect of different salinities and different pH value on the shale inhibitory. The experimental results obtained hydroxide was the promotion of hydration of shale clay dispersion. The higher the concentration of sodium chloride and potassium chloride,the stronger inhibition of shale. Concentration of 2% -10% calcium chloride solution of shale expansion is not very different, but as the concentration further increased, suppression will be significantly improved. Key words: wellbore stability; Shale expansion; fluid property; pH value; mineralization degree |
