Seam Hole Type Carbonate Reservoir Forward Numerical Simulation Research

Worldwide, carbonate rocks are widely distributed, and the old, and in the world's oil and gas reservoirs reservoir in carbonate reservoir is an important oil and gas reservoir, which is rich in oil and gas reserves is extremely. Carbonate reservoir is a kind of oil and gas reservoir, and the important type of carbonate fractured-vuggy reservoir is in the carbonate oil and gas reservoir occupies very important position. Our country started very early on the research of the carbonate oil and gas reservoir, has made good progress, the earliest discovered large carbonate oil and gas- Ren Qiu oil and gas fields in the east, with the rapid development of exploration technology in recent years, as well as the state strengthens the research on carbonate reservoir of oil and gas exploration, and in the puguang, yuan in the west of the dam, tower in oil and gas exploration in areas, such as new progress has been made. Holes and cracks in carbonate rock is the ideal of oil and gas reservoir, thus the carbonate fractured-vuggy reservoir is always the key point of the geologists study. However due to the type carbonate fractured-vuggy reservoir with strong heterogeneity characteristics, namely seam hole form combination of diversity, distribution and complex reservoir space distribution of irregularity, makes the carbonate fractured-vuggy reservoir prediction research very difficult. In this paper, on the basis of the predecessors, and explain the difficulty for exploration, the forward modeling is a numerical simulation method to study on the carbonate fractured-vuggy reservoir, research on reservoir recognition and prediction has the very high application value and practical significance.System in this paper are introduced the carbonate fractured-vuggy reservoir types of reservoir space and reservoir types, and collect the seam hole general seismic facies of reservoir characteristics, this paper introduces the different characteristics of seismic facies recognition criteria and recognition technology, and analyses the corresponding relation between different types of seismic facies reservoir type. This paper choose the central uplift of tarim basin area eagle mountain group of carbonate reservoir as the research object, has been clear about the yingshan group reservoir seismic facies characteristics of different types of reservoir, to establish the corresponding identification standards and the corresponding relations between reservoir. Used in this article, through field geological survey and geological logging data collected in the past, designed a series of in line with the actual situation of geological model, and then based on the seam hole type of carbonate oil and gas reservoir heterogeneity, establishing carbonate single-well seam hole type reservoir geological model, taking single well model as constraint conditions, in combination with seismic attribute data, using nonlinear mapping method, establish approximation of the actual reservoir section cavern and fracture type reservoir geological model of earthquake. For yingshan group established the different size of cave reservoir model, special size cavity model, different size of crack model, special type and model of a crack and cave hybrid model. Using geological model, selecting the ricker wavelet zero-phase do excitation source, the use of homogeneous medium derived under the condition of elastic wave equation of motion, absorbing boundary conditions and initial conditions is studied, and on the established carbonate fractured-vuggy reservoir geological model based on finite difference method of staggered grid to solve the model, get relevant seam hole reservoir after stack forward record, record and forward a seismic depth migration has been done, and obtained the post-stack migration records, use the offset records and seismic forward modeling software to describe the situation into a record, found that both coincide degree is higher. In this paper, the group yingshan carbonate fractured-vuggy reservoir in tarim basin forward numerical simulation study, numerical simulation of forward modeling of seismic migration history, through the analysis of seismic migration records concluded that the central uplift of tarim basin area eagle mountain group carbonate fractured-vuggy reservoir of oil and gas seismic facies characteristics for the beaded and flake seismic facies reservoir is the most favorable oil and gas reservoir. Based on the research of the yingshan group reservoir, oil and gas geological survey work for the next step to provide the basis.