石油钻探技术
石油鑽探技術
석유찬탐기술
PETROLEUM DRILLING TECHNIQUES
2015年
2期
71-77
,共7页
碳酸盐岩油气藏%数值模拟%数学模型%历史拟合%含水率%注水参数
碳痠鹽巖油氣藏%數值模擬%數學模型%歷史擬閤%含水率%註水參數
탄산염암유기장%수치모의%수학모형%역사의합%함수솔%주수삼수
carbonate reservoir%numerical simulation%mathematical model%history matching%water cut%water injection parameter
由于碳酸盐岩油藏中的缝洞储集体分布具有极强的离散性和随机性，现有油藏数值模型不是十分适用。因此，首先以碳酸盐岩油藏溶洞和裂缝的地球物理识别预测结果和物性参数统计特征为主要依据，建立了规整化的离散缝洞分布模式；然后，通过引入裂缝连通流动系数、溶洞弹性储集系数建立了缝洞单元离散数值模拟方法；该模拟方法考虑了裂缝的各向异性和其中流体流动的非达西效应，以及溶洞中油水的重力分异效应，并利用T K472C单井缝洞单元和T K630多井缝洞单元生产历史数据对该模拟方法的可行性和可靠性进行了验证，结果表明，建立的缝洞型油藏离散数值模拟方法是可行和可靠的，可以用于碳酸盐岩油藏数值模拟；最后，基于历史拟合的T K472C单井缝洞单元和T K630多井缝洞单元地质模型，分析了注采参数对注水开发效果的影响。研究结果表明：强底水缝洞单元应依靠底水驱动方式进行开采，弱底水缝洞单元可以通过注入一定量的水来增加地层能量，在一定程度上抑制底水锥进；对于T K630多井缝洞单元，采出程度达到8％～10％时转注水和以3％的采液速度生产，注水开发效果较好。
由于碳痠鹽巖油藏中的縫洞儲集體分佈具有極彊的離散性和隨機性，現有油藏數值模型不是十分適用。因此，首先以碳痠鹽巖油藏溶洞和裂縫的地毬物理識彆預測結果和物性參數統計特徵為主要依據，建立瞭規整化的離散縫洞分佈模式；然後，通過引入裂縫連通流動繫數、溶洞彈性儲集繫數建立瞭縫洞單元離散數值模擬方法；該模擬方法攷慮瞭裂縫的各嚮異性和其中流體流動的非達西效應，以及溶洞中油水的重力分異效應，併利用T K472C單井縫洞單元和T K630多井縫洞單元生產歷史數據對該模擬方法的可行性和可靠性進行瞭驗證，結果錶明，建立的縫洞型油藏離散數值模擬方法是可行和可靠的，可以用于碳痠鹽巖油藏數值模擬；最後，基于歷史擬閤的T K472C單井縫洞單元和T K630多井縫洞單元地質模型，分析瞭註採參數對註水開髮效果的影響。研究結果錶明：彊底水縫洞單元應依靠底水驅動方式進行開採，弱底水縫洞單元可以通過註入一定量的水來增加地層能量，在一定程度上抑製底水錐進；對于T K630多井縫洞單元，採齣程度達到8％～10％時轉註水和以3％的採液速度生產，註水開髮效果較好。
유우탄산염암유장중적봉동저집체분포구유겁강적리산성화수궤성，현유유장수치모형불시십분괄용。인차，수선이탄산염암유장용동화렬봉적지구물리식별예측결과화물성삼수통계특정위주요의거，건립료규정화적리산봉동분포모식；연후，통과인입렬봉련통류동계수、용동탄성저집계수건립료봉동단원리산수치모의방법；해모의방법고필료렬봉적각향이성화기중류체류동적비체서효응，이급용동중유수적중력분이효응，병이용T K472C단정봉동단원화T K630다정봉동단원생산역사수거대해모의방법적가행성화가고성진행료험증，결과표명，건립적봉동형유장리산수치모의방법시가행화가고적，가이용우탄산염암유장수치모의；최후，기우역사의합적T K472C단정봉동단원화T K630다정봉동단원지질모형，분석료주채삼수대주수개발효과적영향。연구결과표명：강저수봉동단원응의고저수구동방식진행개채，약저수봉동단원가이통과주입일정량적수래증가지층능량，재일정정도상억제저수추진；대우T K630다정봉동단원，채출정도체도8％～10％시전주수화이3％적채액속도생산，주수개발효과교호。
Fracture‐cave units in the carbonate reservoir are seriously discrete and random in the distri‐bution ,so existing numerical simulation is not fit for the reservoir .A regular discrete fracture‐cave distribu‐tion mode was established according to geophysical recognition and prediction results of caves and fractures in the carbonate reservoir as well as statistical characteristics of physical parameters ;then ,a discrete nu‐merical simulation method was developed for the fracture‐cave unit based on fracture connection flow coef‐ficient and elastic accumulation coefficient of caves .It took account of fracture anisotropism ,non‐Darcy effect of fracture fluids and gravity differentiation effect of cave oil‐water .Feasibility and reliability of this simulation method were verified based on production history data of TK 472C single‐well fracture‐cave unit and TK630 multi‐well fracture‐cave unit .The results showed that ,the discrete numerical simulation meth‐od of fracture‐cave reservoir was feasible and reliable and could be used for numerical simulation of the car‐bonate reservoir .Finally ,effects of injection‐production parameters on water‐flooding development were an‐alyzed based on geological model of TK472C single‐well fracture‐cave unit and TK630 multi‐well fracture‐cave unit subject to history matching .The results showed that ,bottom water driving should be selected in the fracture‐cave reservoir with strong bottom water ;a certain amount of water could be injected into the fracture‐cave unit with weak bottom water to increase formation energy and control bottom water coning to some extent ;for TK630 multi‐well fracture‐cave unit ,water injection and fluid production rate of 3% could be taken when the recovery percentage was up to 8% 10% ,in order to reach the better water‐flooding development .
