CAJ | 학술논문

针对松南气田气井井筒结垢问题，对垢进行成分分析，并在室内条件下进行结垢实验研究，同时利用饱和指数法对气井结垢进行结垢趋势预测研究。结果表明，松南气井井筒垢物主要为碳酸钙，在一定的井筒产出水中，其他条件不变的情况下，结垢质量随温度的升高而增大，随压力的升高而减小。结合压井液和地层水的配伍性实验可以得出：结垢的主要原因是CaCl2型压井液与地层水的不配伍性，地层水进入井筒后压力下降导致 CaCO3溶解度下降产生沉淀结垢；利用 Oddo-Tomoson饱和指数法对CaCO3结垢趋势的理论预测结果与实际测量结果一致。
침대송남기전기정정통결구문제，대구진행성분분석，병재실내조건하진행결구실험연구，동시이용포화지수법대기정결구진행결구추세예측연구。결과표명，송남기정정통구물주요위탄산개，재일정적정통산출수중，기타조건불변적정황하，결구질량수온도적승고이증대，수압력적승고이감소。결합압정액화지층수적배오성실험가이득출：결구적주요원인시CaCl2형압정액여지층수적불배오성，지층수진입정통후압력하강도치 CaCO3용해도하강산생침정결구；이용 Oddo-Tomoson포화지수법대CaCO3결구추세적이론예측결과여실제측량결과일치。
For the problem of scaling in producing wells in Songnan gas fields,components of the scale samples were analyzed for its,and scaling experimental research was done indoor.In addition,the trend of scaling in gas wells was predict using saturated index method.Results showed that the scale in Songnan gas wells was mainly calcium carbonate.When the well producing water was fixed,the scaling quantity arised with the temperature increasing,while reduced with the pressure rising. Considering the compatibility test,it was indicted that the mainly scaling reason was the mismatch between the CaCO3 well killing fluid and the stratum water,which caused the decrease of pressure when the stratum water get into the wellbore. Theoretic prediction on the tendency of the scaling of CaCO3 was made with the Oddo-Tomoson saturating exponential method, and the result was consistent with the measurement in field.