尹淑敏
YIN Shumin

• 1:大庆油田有限责任公司勘探开发研究院

摘要(Abstract)：

分流河道砂体是大庆油田主要储层类型之一,虽经历了50多年的注水开发与调整,但由于受平面及层内非均质性的影响,目前层内尚有近30%的厚度未水洗,因而分流河道砂体仍是特高含水期油田开发调整的主要对象之一。通过对油田105口密闭取心检查井资料的统计分析及室内水驱油实验研究了不同开发阶段分流河道砂体储层孔隙度、渗透率、泥质含量及粒度中值等参数的变化特征,分析了长期水冲刷后岩样平均孔喉半径、孔喉半径中值、孔喉峰值及渗透率的变化规律,同时建立了水洗厚度和水洗程度与注水开发时间的定量关系,为特高含水期改善分流河道砂体开发效果提供了依据。
Distributary channel sandbodies are one of the main reservoir types in Daqing Oilfield,which have experienced more than 50 years of waterflooding development and adjustment.Because of the influences of the planar and intraformational heterogeneities,nearly 30%of the thickness of the layer inside still has not been flooded,so they are one of the main developed and adjusted objects in the extra high-watercut period of the oilfield.Through the statistical analyses and indoor waterflooded tests of 105 pressure coring-inspecting wells' data,the variation characteristics of the parameters such as the porosity,permeability,shale content and median grain diameter of the distributary channel sandbody reservoirs are studied in different development stages,the changed laws are analyzed for the average pore-throat radius,median pore-throat radius,pore-throat peak and permeability of the rock samples after long-term water flooding,meanwhile the quantitative relationship between the waterflooded thickness & degree and waterflooded development time is established.All the achievements have provided the sound evidences for the improvement of the developed effects of the distributary channel sandbodies.

关键词(KeyWords)： 分流河道;孔隙度;渗透率;泥质含量;粒度中值;水洗程度
distributary channel sand;porosity;permeability;shale content;median grain diameter;waterflooded/water-flushed degree

Abstract:

Keywords:

基金项目(Foundation): 国家重大科技专项“大庆长垣特高含水油田提高采收率示范工程”(2011ZX05052)、国家重大科技专项“剩余油分布综合预测与注采结构精细调整技术”(2011ZX05010-002);; 中国石油天然气股份有限公司科技重大项目“长垣油田水驱开发技术”(2011E-1205)

作者(Author): 尹淑敏
YIN Shumin

参考文献(References)：

• [1]王乃举.中国油藏开发模式总论[M].北京:石油工业出版社,1999:113-136.
• [2]李兴国,孙春红,赵云飞.喇嘛甸油田储层微观结构特征变化规律研究[J].大庆石油地质与开发,2007,26(1):79-82.
• [3]林玉宝,贾忠伟,候战捷,等.高含水后期油水微观渗流特征[J].大庆石油地质与开发,2014,33(1):70-74.
• [4]徐守余,李红南.储集层孔喉网络场演化规律和剩余油分布[J].石油学报,2003,24(4):48-53.
• [5]徐春梅,张荣,马丽萍,等.注水开发储层的动态变化特征及影响因素分析[J].岩性油气藏,2010,22(增刊):89-92.
• [6]伍大庆.大庆长垣各类油层动用状况及挖潜方式探讨[J].大庆石油地质与开发,2010,29(4):70-73.
• [7]朱丽红.特高含水期油层剩余油综合描述及分布特征[J].大庆石油地质与开发,2013,32(6):58-62.
• [8]沈忠山.水下窄河道剩余油与挖潜方法[J].大庆石油地质与开发,2011,30(3):79-83.
• [9]张雁,冯殿辉.分流河道砂体层内微观剩余油分布及影响因素[J].大庆石油地质与开发,2008,27(5):49-52.