Study Of Reservior Modeling For Horizontal Well Exploitation In 1st Block Of Tahe Oilfield

Triassic lower oil formation of 1st Block of Tahe Oilfield contain two Block: 1st main Block and S41-1 Block,Main reservoir is lower oil formation.Triassic reservoir of tahe oilfield has Disadvantages of poor oil formation and early water breakthrough time in vertical wells producing.for this reason,Northwest Branch of Sinopec use horizontal wells exploitation in 2005 quantified (mass) and achieved remarkable results.Horizontal well technology is one of the world s most advanced oil production technologies,is one of the most practical techniques to speed up construction investment,enhanced oil recovery and increase recoverable reserves.Comparison with vertical well Horizontal well has many advantages in increase the drainage area and enhanced oil recovery ,For the development of low permeability reservoirs,thin reservoir,complex fault block oil and gas field and heavy oil reservoirs,has proved to be one of the most effective technology.One of the key techniques in development with horizontal well is to establish an accurate 3-D geological model of reservoir to delineate definite certain geogical target.The reliability of three-dimensional geological modeling is directly related to the effect of horizontal wells.Reliability of 3-D geological modeling is directly related to the effect of horizontal wells.For characteristics of horizontal wells it is necessary to further enhance study on the development model of horizontal well,increase reservoir heterogeneity and detailed reservoir description,and establish a three-dimensional geological model which fit of adjustment of horizontal wells exploitation.Conventional modeling method mainly used in vertical wells.Currently Petrel software is usually used to model three frames on the flat such as top, middle,bottom,establish border traps,fault direction and the trend line to control the grid unit,Set the grid cell density.But the grid of this method is on the basis of Calculation of average interpolation,Grid cell density is set to a fixed value of their own.Obviously can't apply to Horizontal well modeling which affected Serious by the surface heterogeneity.Due to the horizontal well and stratum in space has unique relation,Horizontal material in describing the lateral changes of reservoir characteristic has the incomparable advantage,compared to the traditional vertical or horizontal conventional high Angle deviated holes.Based on the reservoir heterogeneity research achievements,This article research the matching relationshipporosity such as the permeability, porosity ,dash coefficient and Coefficient of variation,combining structure, sedimentary equal development of geological factors,division parameter range,use different interpolation methods for the horizontal well's Parameter.It Complete by means of Setting fault block technology In the process of modeling.It Improve grid density in the dense parameter variation,and set low density.Such can Control the precision in the serious heterogeneity Block, Close to the real geological situation,and can Control calculation. Establish the three-dimensional geological model which adapt to horizontal wells,by using PETREL software.At last verificate model correctness With the known profile of single well and oil reservoir.