CAJ | 학술논문

钻头破碎地层后，地层中的烃类气体组分由钻井液携带至地面，一部分随即散失在空气中，一部分溶解在钻井液内，检测溶解在钻井液内烃类气体组分的体积及体积分数是发现和评价油气显示的重要方式之一。不同的烃类气体组分溶入钻井液的能力是不同的，只检测溶解在钻井液内烃类气体组分，不能及时发现和准确评价井下油气藏。为此，首次提出“溶入系数”概念及求取方法，借助钻井液高温高压旋转模拟装置，进行了不同烃类气体组分在井下高温高压流动状态下溶入钻井液能力实验，得出不同体积烃类气体组分在井下状态下的“溶入系数”。根据不同烃类气体组分的“溶入系数”，可计算出地下岩层某种烃类组分真实含量，更加客观地反映地层含油气信息，有利于油气显示的及时发现和准确评价。
찬두파쇄지층후，지층중적경류기체조분유찬정액휴대지지면，일부분수즉산실재공기중，일부분용해재찬정액내，검측용해재찬정액내경류기체조분적체적급체적분수시발현화평개유기현시적중요방식지일。불동적경류기체조분용입찬정액적능력시불동적，지검측용해재찬정액내경류기체조분，불능급시발현화준학평개정하유기장。위차，수차제출“용입계수”개념급구취방법，차조찬정액고온고압선전모의장치，진행료불동경류기체조분재정하고온고압류동상태하용입찬정액능력실험，득출불동체적경류기체조분재정하상태하적“용입계수”。근거불동경류기체조분적“용입계수”，가계산출지하암층모충경류조분진실함량，경가객관지반영지층함유기신식，유리우유기현시적급시발현화준학평개。
When drilling bit has cut through strata, crushed rocks and gases are carried to ground by drilling fluid. Some of them are dissipated in the air immediately, and some are dissolved in drilling fluid. To detect the dissolved volume and volume fraction of hydrocarbon gas components is one of the most important methods to discover and evaluate oil-and-gas shows. Different hydrocarbon gas components have different dissolving capacities. And reservoir cannot be discovered and evaluated timely and accurately if the dissolving test of various hydrocarbon gases is just done. For this reason, a “dissolving coefficient” and its solving method are proposed for the first time. Through the dissolving test of various hydrocarbon gases with a rotary simulation device of drilling fluid in high temperature and high pressure, we recognize the dissolving coefficient in these circumstances. According to the dissolving coefficient, the true content of a certain hydrocarbon composition is calculated. This will be advan-tageous to discover and evaluate oil-and-gas shows timely and accurately.