發(fā)布時(shí)間：2018-06-15 21:24

  本文選題：煤巖 + 井壁穩(wěn)定��； 參考：《西南石油大學(xué)》2015年碩士論文

【摘要】：紅河油田作為中石化華北分公司石油產(chǎn)量的主力區(qū)塊,探明儲(chǔ)量4.53×108t。然而,在紅河油田水平井鉆井過(guò)程中延安組的多套煤層井壁坍塌問(wèn)題,導(dǎo)致紅河油田水平井在鉆進(jìn)、起下鉆、測(cè)井、通井過(guò)程中遇阻卡鉆等一系列井下復(fù)雜情況,使得紅河油田水平井平均機(jī)械鉆速偏低、鉆井周期較長(zhǎng),嚴(yán)重制約了紅河油田整體開發(fā)效率的提升。 為有效解決紅河油田煤層井壁坍塌問(wèn)題,本文首先結(jié)合紅河油田實(shí)鉆情況,通過(guò)室內(nèi)實(shí)驗(yàn)確定紅河油田煤巖微觀結(jié)構(gòu)類型、力學(xué)特性參數(shù)以及孔滲特性參數(shù)；其次,從力學(xué)角度出發(fā),結(jié)合紅河油田煤巖力學(xué)特性與孔滲特性、煤巖地應(yīng)力狀態(tài)、煤巖強(qiáng)度破壞準(zhǔn)則,建立紅河油田煤巖坍塌壓力計(jì)算模型；再次,根據(jù)建立的紅河油田煤巖坍塌壓力計(jì)算模型,利用Mathcad軟件編程計(jì)算,研究了地應(yīng)力、井眼軌跡、煤巖割理發(fā)育程度、煤巖孔滲特性、鉆井液滲流時(shí)間等對(duì)紅河油田煤巖坍塌壓力的影響。最后,利用試驗(yàn)井進(jìn)行實(shí)例計(jì)算,探討分析了紅河油田煤層井壁防塌控制措施,通過(guò)現(xiàn)場(chǎng)應(yīng)用對(duì)本文建立的紅河油田煤巖坍塌壓力計(jì)算模型及提出的煤層防塌措施進(jìn)行了效果評(píng)價(jià)。論文研究表明：①紅河油田煤巖井壁失穩(wěn)以力學(xué)失穩(wěn)為主,且煤巖龜裂系數(shù)越低,煤巖強(qiáng)度越低,煤巖坍塌壓力則越大；煤層綜合滲透系數(shù)越小,煤層坍塌壓力越小,煤層綜合滲透系數(shù)越大,煤層坍塌壓力則越大。②紅河油田煤層井壁穩(wěn)定控制措施包括：控制合理的鉆井液密度與鉆井液性能,適當(dāng)提高鉆井液封堵抑制能力,嚴(yán)格控制起下鉆速度、減少鉆柱對(duì)煤巖碰撞、盡量以小井斜快速穿過(guò)延安組多套煤層。③紅河油田煤巖坍塌壓力計(jì)算模型及煤巖防塌措施在紅河油田具有較高的適用性,值得在紅河油田推廣運(yùn)用。 總之,紅河油田煤層井壁失穩(wěn)機(jī)理、紅河油田煤層坍塌壓力及其影響因素、紅河油田煤層防塌措施的系統(tǒng)研究,對(duì)縮短紅河油田鉆井周期、降低鉆井成本、提高紅河油田開發(fā)效率具有積極意義。
[Abstract]:As the main oil production block of Sinopec North China Branch, Honghe Oilfield has proved reserves of 4.53 脳 108 t. However, in the process of horizontal well drilling in Honghe Oilfield, the collapse of multiple sets of coal seam wall in Yan'an formation leads to a series of complicated downhole conditions such as drilling, logging, and blocking in the process of drilling. The average mechanical drilling speed of horizontal wells in Honghe Oilfield is low and the drilling period is long, which seriously restricts the improvement of the overall development efficiency of Honghe Oilfield. In order to effectively solve the problem of coal seam wall collapse in Honghe Oilfield, this paper firstly combines the actual drilling situation of Honghe Oilfield, and through laboratory experiments, determines the microstructure type, mechanical property parameter and pore permeability characteristic parameter of coal and rock in Honghe Oilfield. From the mechanical point of view, combined with the mechanical characteristics of coal and rock in Honghe Oilfield, the characteristics of pore and permeability, the state of in-situ stress of coal and rock, and the criterion of strength of coal and rock, the calculation model of collapse pressure of coal and rock in Honghe Oilfield is established. According to the calculation model of coal and rock collapse pressure in Honghe Oilfield, and using Mathcad software to calculate, the ground stress, borehole trajectory, coal rock cleavage development degree, coal and rock pore permeability characteristics are studied. Influence of percolation time of drilling fluid on collapse pressure of coal and rock in Honghe Oilfield. Finally, by using the test well to carry on the example calculation, discussed and analyzed the Honghe oil field coal seam wall to prevent the sloughing control measure, The calculation model of coal and rock collapse pressure in Honghe Oilfield and the measures to prevent coal seam sloughing are evaluated by field application. The research shows that the instability of coal and rock wall is mainly mechanical instability, and the lower the crack coefficient of coal and rock, the lower the strength of coal and rock, the greater the collapse pressure of coal and rock, the smaller the comprehensive permeability coefficient of coal seam, the smaller the collapse pressure of coal seam. The bigger the comprehensive permeability coefficient of coal seam is, the greater the collapse pressure of coal seam is. 2. The stable control measures of coal seam lining in Honghe Oilfield include: controlling reasonable drilling fluid density and drilling fluid performance, improving the plugging and inhibiting ability of drilling fluid appropriately. Strictly controlling the down drilling speed, reducing the collision of drill string to coal and rock, making use of small well slant to pass through Yanan formation multiple sets of coal and rock collapse pressure calculation model of Honghe oilfield and coal rock collapse prevention measures have high applicability in Honghe oilfield, as far as possible. It is worth popularizing in Honghe Oilfield. In a word, the mechanism of coal seam wall instability in Honghe Oilfield, the collapse pressure of coal seam and its influencing factors, and the measures of preventing coal seam collapse in Honghe Oilfield are studied systematically, which can shorten the drilling period and reduce the drilling cost in Honghe Oilfield. It is of great significance to improve the development efficiency of Honghe Oilfield.
【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TE28

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 楊永杰;王德超;王凱;黃冬梅;;煤巖強(qiáng)度及變形特征的微細(xì)觀損傷機(jī)理[J];北京科技大學(xué)學(xué)報(bào);2011年06期

2 王福印,王海濤,武少英,周健華,李貴云;煤層防塌鉆井液技術(shù)[J];斷塊油氣田;2002年05期

3 朱榮東;陳平;夏宏泉;范翔宇;;裂縫井壁力學(xué)穩(wěn)定性研究[J];斷塊油氣田;2007年05期

4 譚強(qiáng);鄧金根;張勇;黃熠;蔚寶華;陳永浩;;各向異性地層定向井井壁坍塌壓力計(jì)算方法[J];斷塊油氣田;2010年05期

5 王生維，張明，莊小麗;煤儲(chǔ)層裂隙形成機(jī)理及其研究意義[J];地球科學(xué);1996年06期

6 傅雪海,秦勇,姜波,王文峰;多相介質(zhì)煤巖體力學(xué)實(shí)驗(yàn)研究[J];高校地質(zhì)學(xué)報(bào);2002年04期

7 唐立強(qiáng);楊敬源;王勇;楊在林;;井壁穩(wěn)定性的斷裂損傷力學(xué)分析[J];哈爾濱工程大學(xué)學(xué)報(bào);2007年06期

8 蘇現(xiàn)波;煤層氣儲(chǔ)集層的孔隙特征[J];焦作工學(xué)院學(xué)報(bào);1998年01期

9 閆立宏,吳基文,劉小紅;水對(duì)煤的力學(xué)性質(zhì)影響試驗(yàn)研究[J];建井技術(shù);2002年03期

10 蘇現(xiàn)波,馮艷麗,陳江峰;煤中裂隙的分類[J];煤田地質(zhì)與勘探;2002年04期

，

本文編號(hào)：2023704