CAJ | 학술논문

气体循环钻井是一种新的工艺方式,与常规气体钻井存在不同之处.当气体钻井转变为气体循环钻井时,井内的压力、流速会发生变化,进而对携岩产生影响.因此,针对气体循环钻井的室内相似模拟的研究具有重要的工程意义.在相似理论的基础上,以管流内压力的变化规律为研究对象,对气体循环钻井室内模拟方法进行了研究.研究的3种模拟方法分别为动力相似模拟、雷诺数相似模拟、欧拉数相似模拟.其中,动力相似模拟适用于对关键点的模拟,雷诺教相似模拟适用于对整体过程的模拟,欧拉数相似模拟适用于对部分井段的模拟.通过不同模拟条件下的模拟数据对比,验证了3种模拟方法的可行性,为气体循环钻井室内相似模拟奠定了理论基础.
기체순배찬정시일충신적공예방식,여상규기체찬정존재불동지처.당기체찬정전변위기체순배찬정시,정내적압력、류속회발생변화,진이대휴암산생영향.인차,침대기체순배찬정적실내상사모의적연구구유중요적공정의의.재상사이론적기출상,이관류내압력적변화규률위연구대상,대기체순배찬정실내모의방법진행료연구.연구적3충모의방법분별위동력상사모의、뢰낙수상사모의、구랍수상사모의.기중,동력상사모의괄용우대관건점적모의,뢰낙교상사모의괄용우대정체과정적모의,구랍수상사모의괄용우대부분정단적모의.통과불동모의조건하적모의수거대비,험증료3충모의방법적가행성,위기체순배찬정실내상사모의전정료이론기출.
Gas circle drilling is a new drilling technology, which is difference from conventional gas drilling. When gas drilling is transformed into the cyclic form, the pressure and gas velocity in the bore hole will be changed, as a result the earring capacity of the rock will be influenced. So it is of great significance to carry out simulation research on the gas circle drilling in the lab. Based on the similarity theory, taking the pressure variation regulalarity as the research target, three simulation methods of gas circle drilling are studied in the lab, i.e. the similar dynamic simulation that is applicable to the simulation of key points, the similar Reynold's mumber simulation that is applicable to the simulation of the whole process, and the similar Euler number simulation that is applicable to the simulation of some hole sections. They are proved to be feasible as the results of the related simulation coincide with the theory, providing theoretical basis for the lab simulation of gas circle drilling.