延长长6 浅油层水平缝水平井压裂参数设计

水平井压裂技术是开发难动用低渗储层的有效手段，而对于长6 低渗浅油层实施压裂技术一般会形成水平缝（低角度），影响实际施工效果。为了指导长6 浅油层水平井的压裂设计和现场施工，把孔隙度、渗透率、含油饱和度、泥质含量和渗流系数作为主要参数，将七平1 井的水平段储层划分出5 个流动单元，进行了Ⅰ类、Ⅱ类、Ⅲ类流动单元的评价；并且根据流动单元的划分结果，完成了七平1 井压裂水平裂缝条数、裂缝位置、裂缝半长的参数设计，经过现场压裂效果分析，该设计符合延长长6 浅油层的储层特征及开发要求，单井产能大幅增加，使水平井开发在延长长6 浅油层具有可观前景。

Horizontal well fracturing parameter design for horizontal fractures in Chang-6 shallow oil reservoirs in Yanchang Oilfield

Horizontal well fracturing technology is an effective way to develop the hard-to-produce low permeability reservoirs, but horizontal fractures (low angle) are usually formed when fracturing Chang-6 shallow oil reservoirs with low permeability, which affects the actual construction effectiveness. In order to better guide the field fracturing design and construction for horizontal wells of Chang-6 shallow oil reservoir, the porosity, permeability, oil saturation, shale content and seepage coefficient were used as main parameters, and the reservoirs of horizontal segment in Qiping-1 well was divided into 5 flow units, and evaluation was conducted to typesⅠ,Ⅱand Ⅲ flow units. According to the division of flowing units, the parameter design of number of horizontal fractures, fracture location, half length of fractures was completed for Qiping-1 well. The analysis of field fracturing effectiveness shows that this design meets the reservoir features and development requirement of Chang-6 shallow oil reservoirs in Yanchang Oilfield. The productivity of single well was increased greatly. Horizontal well development of Chang-6 shallow oil reservoir enjoys a favorable prospect.