CAJ | 학술논문

以华庆油田为代表的超低渗透油藏定向井单井产量低，日产量小于1．0 t的低产低效井占56．2％。常规重复压裂压裂后的油井增产效果不理想，具体表现在压裂后增产幅度小、产量递减速度快、有效期短。针对长庆油田华庆区块超低渗透储层油井的重复改造，将混合水体积压裂技术应用于老井重复压裂中，形成了老井混合水体积压裂配套工艺技术，并在考虑井网和注水条件下，进行体积压裂理论与多级暂堵多缝压裂理论的结合研究。室内工艺优化结果和9口井的现场试验表明，措施后油井的平均单井日增油量2．81 t。截至目前，平均单井有效生产天数达252天，增产效果显著。该技术的成功实施运用，为超低渗透油藏重复压裂效果的提高提供了有力的依据。
이화경유전위대표적초저삼투유장정향정단정산량저，일산량소우1．0 t적저산저효정점56．2％。상규중복압렬압렬후적유정증산효과불이상，구체표현재압렬후증산폭도소、산량체감속도쾌、유효기단。침대장경유전화경구괴초저삼투저층유정적중복개조，장혼합수체적압렬기술응용우로정중복압렬중，형성료로정혼합수체적압렬배투공예기술，병재고필정망화주수조건하，진행체적압렬이론여다급잠도다봉압렬이론적결합연구。실내공예우화결과화9구정적현장시험표명，조시후유정적평균단정일증유량2．81 t。절지목전，평균단정유효생산천수체252천，증산효과현저。해기술적성공실시운용，위초저삼투유장중복압렬효과적제고제공료유력적의거。
Single well has low yield in Huaqing low permeability oilfield .The wells with daily output less than 1 tons account for a larger proportion of total wells ,reaching 56 .2% in Huaqing Oilfield .Re-fracturing is an important measure to improve the production of fractured wells in Changqing ultra-low permeability reservoirs .Currently ,the re-fracturing well stimulation is not ideal by using the conventional technologies .The performances such as small yield increase ,wa-ter cut rising ,production decline suddenly ,short increasing period are appeared after re-fractu-ring .In this paper ,the hybrid slick water SRV and multi-stage temporary blocking fracturing are combined to work for old production wells in ultra-low permeability reservoirs .Considering the well pattern and injection well conditions ,the theories of volumetric fracturing and multi-stage temporary blocking are combined .After the parameters optimization in the laboratory and appli-cation of nine wells in the field ,the average single well daily output increased 2 .81 t ,the effec-tive production period for average single well is up to 252 days ,and the effect of increasing yield is significant .The successful application of this technique also provides a strong basis for the re-fracturing in ultra-low permeability reservoir .