SPE Member

Abstract

For many difficult reservoir simulation problems, the fully implicit black-oil models are the only efficient and viable means to the solution. Because of their stringent demands on computer's power. The fully implicit simulators are generally run on mini, main or super computers. However, the current trend of 32-bit microprocessors being used in the main-stream Personal Computers (PC) opens a new horizon for reservoir simulation applications. This paper examines the feasibility of a fully implicit black-oil simulator run on these PC's. The simulator uses a general black-oil formulation and can solve 3-dimensional, 3-phase problems with multi-layered wells. problems with multi-layered wells. Two aspects which affect the applicability of person a computer environment in reservoir simulation are addressed. First, various considerations for models's efficiency in program design and coding are discussed PC systems are program design and coding are discussed PC systems are compared. The calculation examples show that the fully implicit black-oil model presented can be run efficiently on the current 1386 type of PC's for problems up to several thousands grid blocks. For putting the advances of personal computer environment in perspective, some runs personal computer environment in perspective, some runs made on the new IBM RISC/6000 320 desktop are also presented. presented.

BACKGROUND

Even though many black-oil models use IMPES or sequential formulation for the sake of computational efficiency, the fully implicit model is still the only efficient and viable method to solve many difficult reservoir simulation problems. Because of their stringent demands for the problems. Because of their stringent demands for the computer's speed and memory, the fully implicit simulators are usually run on the mini, mainframe or super computers.

To be able to run a program on personal computers is always tempting. Because they are easy to access and use, and economic. There also exists a large numbers of utility programs for PC's which are of great help in preparing programs for PC's which are of great help in preparing and reporting the work being done. One can use pc either to run an entire simulation or to prototype the input dataset for a complex field simulation to be run on a large computer.

For a long time (under computer industrial's standard), few reservoir simulation applications have been run in the personal computer environment. The reason is simple personal computer environment. The reason is simple they are not powerful enough to meet requirements of intensive computations and large amount of data storage associated with the reservoir simulation calculations. The 16-bit (98 bit with earlier PC's) word length of 80286 processor is inherently inefficient to the floating point (single or processor is inherently inefficient to the floating point (single or double precision) representation. The processor's speed is low and the storage is limited.

P. P.

This content is only available via PDF.
You can access this article if you purchase or spend a download.