CAJ | 학술논문

DH气藏目前处于开采中后期，需要开展水驱砂岩气藏采收率标定研究，残余气饱和度是水驱砂岩气藏采收率标定的重要参数。用单向自发渗吸实验装置，测试了DH气藏砂岩岩样残余气饱和度。基于实验结果，分析得出岩样初始含水饱和度的大小会直接影响残余气饱和度的大小，而最大残余气饱和度受孔隙度和渗透率影响较小。实验测试结果与Land模型吻合较好，而与Agarwal模型吻合较差。根据DH气藏的原始含水饱和度，通过本次实验建立的原始含气饱和度和残余气饱和度之间的关系，计算得到DH气藏的残余气饱和度，并用该计算结果简要分析了DH气藏今后提高天然气采收率的对策。
DH기장목전처우개채중후기，수요개전수구사암기장채수솔표정연구，잔여기포화도시수구사암기장채수솔표정적중요삼수。용단향자발삼흡실험장치，측시료DH기장사암암양잔여기포화도。기우실험결과，분석득출암양초시함수포화도적대소회직접영향잔여기포화도적대소，이최대잔여기포화도수공극도화삼투솔영향교소。실험측시결과여Land모형문합교호，이여Agarwal모형문합교차。근거DH기장적원시함수포화도，통과본차실험건립적원시함기포화도화잔여기포화도지간적관계，계산득도DH기장적잔여기포화도，병용해계산결과간요분석료DH기장금후제고천연기채수솔적대책。
DH gas reservoir is at the middle-later period of exploitation,calibrating and improving the recovery of the water-driven sandstone gas reservoir and adjusting the development plan are very important. Before this,studying the residual gas can provide an accurate parameter for recovery calibration work. Adopting the co-current spontaneous imbibition experimental facility we tested the residual gas saturations of the sandstone samples from DH gas reservoir. The results revealed that initial gas saturation had an important effect on residual gas saturation,and porosity and permeability had a little influence on maximum residual gas saturation. The experimental results could coincide with Land’s model very well,but not with the Agrawal’s model. Based on the initial gas saturation of DH gas reservoir to the formula we calculated the residual gas saturation of DH gas reservoir. And by using the result of residual gas saturation we analyze the countermeasure of enhancing nature gas recovery of DH gas reservoir in the future.