海上裂缝性低渗透油藏矩形井网合理井距研究——以渤海B油田为例  

Study on reasonable well spacing of rectangular well pattern in offshore natural fractured low permeability reservoirs:taking Bohai B Oilfield as an example

作　　者：凌浩川 周海燕 孙强 杨磊 潘杰 LING Haochuan;ZHOU Haiyan;Sun Qiang;YANG Lei;PAN Jie(Bohai Oilfield Research Institute,CNOOC Ltd.,Tianjin 300459,China)

机构地区：[1]中海石油(中国)有限公司天津分公司渤海石油研究院,天津300459

出　　处：《复杂油气藏》2020年第2期43-46,共4页Complex Hydrocarbon Reservoirs

基　　金：“十三五”国家科技重大专项“渤海油田加密调整及提高采收率油藏工程技术示范”(2016ZX05058001)。

摘　　要：为了确定海上裂缝性低渗透油藏采用矩形五点法井网的合理井距,尽量平衡海上少井高产与建立有效注采之间的矛盾,根据谢卡尔乔夫公式提出了利用海上平均单井累产油最大化来确定油井井距的方法。方法计算结果表明:随着井距的增加,井组累产油呈现先增加后减少的趋势,即存在一个最佳的井距使得井组累产油最高,且这个最佳井距随着渗透率的增加而增大。该方法与考虑启动压力梯度的极限井距相结合可以综合判断海上裂缝性油藏采用矩形五点法井网开发的可行性,指导海上裂缝性低渗透油藏合理井距的设计。In order to determine the reasonable well spacing of rectangular five-point well pattern in offshore natural fractured low-permeability reservoirs,and to balance the contradiction between high production rate with few wells in offshore oilfields and the establishment of effective injection and production as far as possible,based on Chekarchev formula,a method for determining oil well spacing is proposed by using the maximization of total oil production of the average single offshore wells.The results of the method show that with the increase of the well spacing,the total oil production of the well group increases first and then decreases,that is,there is an optimum well spacing which makes the total oil production of the well group the highest,and the optimum well spacing increases with the increasing of the permeability.Combined with the limit well spacing considering the starting pressure gradient,this method can be used to synthetically judge the feasibility of using the rectangular five-point well pattern in offshore natural fractured reservoirs,guiding the design of reasonable well spacing in offshore natural fractured low permeability reservoirs.

关 键 词：海上油田 低渗透油藏 累产油 天然裂缝 合理井距 

分 类 号：TE312[石油与天然气工程—油气田开发工程]