辽宁工程技术大学学报(自然科学版)
遼寧工程技術大學學報(自然科學版)
료녕공정기술대학학보(자연과학판)
JOURNAL OF LIAONING TECHNICAL UNIVERSITY NATURAL SCIENCE EDITION
2013年
3期
353-356
,共4页
低渗透油藏%低速非线性渗流%双重介质%试井%有限差分%新模型%非达西%典型曲线
低滲透油藏%低速非線性滲流%雙重介質%試井%有限差分%新模型%非達西%典型麯線
저삼투유장%저속비선성삼류%쌍중개질%시정%유한차분%신모형%비체서%전형곡선
low permeability reservoirs%low-velocity non-linear flow%double medium%well test%finite difference method%new model%non-Darcy%type curves
解决低渗透油藏双重介质试井解释问题.基于低速非线性渗流新模型,建立了考虑井筒储集效应与表皮系数的低渗透油藏双重介质试井解释模型,利用有限差分进行数值求解,绘制了无因次试井典型曲线,并对无因次非线性参数 c1D 和 c2D 进行了分析.结果表明:非线性渗流主要影响基质系统与裂缝系统的窜流阶段,表现为导数曲线的凹子深度变小.c1D 和 c2D 是决定曲线形态的特征参数.当 c1D 与 c2D 的和不为常数时,c1D 或 c2D 增大,凹子深度变小;当 c1D 与 c2D 的和为常数时,c1D 增大即 c2D 减小,凹子深度变小.对于封闭边界和定压边界在试井曲线上的压力响应,新模型与达西模型一致.
解決低滲透油藏雙重介質試井解釋問題.基于低速非線性滲流新模型,建立瞭攷慮井筒儲集效應與錶皮繫數的低滲透油藏雙重介質試井解釋模型,利用有限差分進行數值求解,繪製瞭無因次試井典型麯線,併對無因次非線性參數 c1D 和 c2D 進行瞭分析.結果錶明:非線性滲流主要影響基質繫統與裂縫繫統的竄流階段,錶現為導數麯線的凹子深度變小.c1D 和 c2D 是決定麯線形態的特徵參數.噹 c1D 與 c2D 的和不為常數時,c1D 或 c2D 增大,凹子深度變小;噹 c1D 與 c2D 的和為常數時,c1D 增大即 c2D 減小,凹子深度變小.對于封閉邊界和定壓邊界在試井麯線上的壓力響應,新模型與達西模型一緻.
해결저삼투유장쌍중개질시정해석문제.기우저속비선성삼류신모형,건립료고필정통저집효응여표피계수적저삼투유장쌍중개질시정해석모형,이용유한차분진행수치구해,회제료무인차시정전형곡선,병대무인차비선성삼수 c1D 화 c2D 진행료분석.결과표명:비선성삼류주요영향기질계통여렬봉계통적찬류계단,표현위도수곡선적요자심도변소.c1D 화 c2D 시결정곡선형태적특정삼수.당 c1D 여 c2D 적화불위상수시,c1D 혹 c2D 증대,요자심도변소;당 c1D 여 c2D 적화위상수시,c1D 증대즉 c2D 감소,요자심도변소.대우봉폐변계화정압변계재시정곡선상적압력향응,신모형여체서모형일치.
@@@@In order to investigate the influence of low-velocity fluid flow on double medium well test, based on a low-velocity non-linear new model for low permeability reservoirs, a double medium well testing model considering wellbore storage and skin effect was established and solved by finite different method in this study. In addition, the impact of dimensionless non-linear parameters c1D and c2D on well testing curves was analyzed. The results show that the non-linear flow mainly affects the cross flow between matrix and fracture system, which manifests as caviton in the pressure derivative curves. The parameters c1D and c2D determine the shape of caviton. With the increase of c1D or c2D when the sum of c1D and c2D is not constant, or with the increase of c1D and the decease of c2D when the sum of c1D and c2D is constant, the depth of caviton becomes shallow. The pressure response for the new model is in agreement with Darcy’s model both in the closed boundary and constant pressure boundary.
