CAJ | 학술논문

传统气井配产方法应用于大牛地低压、低渗、低产致密砂岩气藏产水气井时,气井的携液潜能得不到充分发挥,累计排水采气量大,最终采收率低.基于产水气藏物质平衡原理、气井产能、井筒压力温度分布预测理论,应用节点系统分析方法建立了产水气井生产动态预测方法,该方法能动态预测地层压力、井底流压、井口油压、产量、采收率随时间的变化;结合连续携液理论提出了产水气井配产新方法,该方法所配气量高于井口临界携液气量,且随时间动态递减,而不是保持不变.大牛地 DK3 井实例计算表明,新方法能更长时间维持气井连续携液生产,降低了累计排水采气量,提高了最终采收率.
전통기정배산방법응용우대우지저압、저삼、저산치밀사암기장산수기정시,기정적휴액잠능득불도충분발휘,루계배수채기량대,최종채수솔저.기우산수기장물질평형원리、기정산능、정통압력온도분포예측이론,응용절점계통분석방법건립료산수기정생산동태예측방법,해방법능동태예측지층압력、정저류압、정구유압、산량、채수솔수시간적변화;결합련속휴액이론제출료산수기정배산신방법,해방법소배기량고우정구림계휴액기량,차수시간동태체감,이불시보지불변.대우지 DK3 정실례계산표명,신방법능경장시간유지기정련속휴액생산,강저료루계배수채기량,제고료최종채수솔.
@@@@Applying?traditional?production?allocation?method?to?water?produced?gas?wells?in?Daniudi?field,?characterized?with?low?pressure, low permeability, and low production, can not fully use liquid removing potential, leading to large accumulative production of deliquification?and?finally?low?ultimate?recovery.?The?paper?theoretically?set?up?a?dynamic?prediction?model?for?water?produced?gas?well,?by?nodal?system?analysis,?based?on?material?balance?principle,?well?productivity?and?flowing?pressure?and?temperature?drop?theories.?The?model?can?predict?reservoir?pressure,?bottom?hole?flowing?pressure,?wellhead?flowing?pressure,?production?rate,?and?recovery?varying?with time. A new production allocation method was proposed, considering continues liquid removing theory. The allocated production dynamically decreases with time, and is always larger than critical gas rate for liquid removal, which avoids lower ultimate recovery. Daniudi DK3 well was used as an example to be compared with published method, and the results show that the new method can reduce the?accumulative?production?of?deliquification,?and?enhance?ultimate?recovery..