特低丰度超薄油层水平井开发影响因素  

THE IMPACTING FACTORS OF HORIZONTAL WELL DEVELOPMENT IN THE SUPER-LOW ABUNDANCE AND SUPER-THIN PAY ZONES

作　　者：张国良[1,2] 罗中华[2] 赵德利[2] 刘月田[3] 

机构地区：[1]西南石油大学资源与环境学院,四川成都610500 [2]大庆油田公司第八采油厂,黑龙江大庆163514 [3]中国石油大学石油天然气工程学院,北京昌平102249

出　　处：《西南石油大学学报（自然科学版）》2008年第6期109-112,共4页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：中国石油天然气股份有限公司项目(20050417)

摘　　要：针对特低丰度超薄油层水平井的开发问题,研究了影响水平井产能的主要因素、敏感程度,现有井网的渗流与开发特征及调整方法。以大庆外围葡萄花油层为例,其最突出特点是油层厚度小,单位面积油藏供液能力和吸水能力弱,研究认为:水平井必须充分扩大控制面积才能保证足够的产油量和开发效益,单位面积油藏内有效水平井段长度(即水平井的油层钻遇率)保持较小状态,就可以与特低丰度油层供液能力相匹配,即满足油层产液的需要;该类油藏布井的关键是要精确控制钻遇点在水平面上的位置。阶梯状水平井井网油水驱替前缘及剩余油区域均为不对称、不均衡状态,影响井网开发效果,利用不均衡分层注水或分支水平井代替阶梯水平井等调整方法,可以明显改善开发效果。Aiming at the horizontal well development in super-low abundance and super-thin pay zones,the main factors and sensitivity impacting the deliverability,as well as the flow through porous media,exploitating characteristics and adjustment method,are studied.Putaohua reservoir,Daqing Oilfield is taken as an example,it is pointed out that the exclusive characteristics of the reservoir are the thing pay zones and poor liquid-supplying and absorbing capacity on unit area.Research indicates that in order to ensure enough crude production and development efficiency,the controlling area of horizontal well must be fully enlarged,the effective horizontal section lengh in unit area reservoir(i.e.,the penetrated pay zone rate) is kept shorter,which will be accordance with the liquid-supplying capacity,and the liquid production of reservoirs will meet requirement.The key of the well spacing in the reservoirs is to precisly controll the location of penetrated target on plain.The oil and water flooding frontier and residual oil area of well paten for laddered horizontal wells are all insymetrical and uneven,which will impact the development effectiveness,however,by using uneven layered water injection or branched horizontal wells substituting laddered horizontal wells,the development effectiveness can be greatly improved.

关 键 词：特低丰度 水平井 影响因素 开发调整 

分 类 号：TE313[石油与天然气工程—油气田开发工程]