Method For The Optimization Design Of Oil And Gas Well Testing System Research

During the exploration and development of an oil-gas field, well completing test is the key direct method to discover oil-gas reservoir and study its characteristics. Besides it is also the important process to obtain data for oil-gas production. So it needs that the data must be accurate and reliable, so that the evaluating result is scientific. This technique need to optimize the method of open well and the test working system, ultimately, the right knowledge and reservoir potential optimization can be gotten.The basic mode of well test is that the well flow must sufficiently, and pressure drop must get to the investigation radius, and then developsing shut-in pressure recovery test. However, in order to make the pressure to restore the data to show fully the oil and gas reservoir flow mechanisms and boundary characteristics, and to determine the oil and gas reservoir parameters and boundary distance, we need know how much open wells flow is, how long the time for open well pressure drop test and shut-in pressure recovery test is, which is the fundamental goal of the test design.To ensure that the test is successful, the information is complete and the explanation is reliable, a reasonable test work system need to determine by using the test design method. Although the industry has given extensive attention to test design, but it has used the empirical or approximate the relationship between the preliminary estimates, the complete means of considering the influence of various factors is lack.To this end. based on wellbore flow and reservoir seepage coupling mechanism, we carry out the following work1) When the reservoir condition is very complex, the complex seepage models can be normalized to a simplify traditional ones by introducing the pseudo-pressure. And then the models of the homogeny and double medium reservoir for the different external boundary are solved by using the mirror image and superposition principle.2) The wellbore pipe flow model and the glib flow model can be builted by thinking of the borehole drag and glib characteristics.3) Based on the coupled models, which couples reservoir seepage, wellbore pipe flow and glib flow by using the nodal analysis method, a test simulator can be created.4) On the basis of simulator, the whole course simulating can do about the pressure buildup test design, well completion test design, deliverability test design and delineation drilling tes design. In order to provide advanced tools for test design programs preferred, a comprehensive analysis of the impact of various factors on the test data need to do.Based on the above four aspects of the research work, we can study the impact of different operating system on the quality of test data, the impact of the uncertainty of the formation parameters of the test success rate to make more scientific, more systematic reservoir test program...