Due to geologic conditions and drilling and logging technology limitation, many wells, especially old exploration wells are often collapsed in the borehole, which influences the quality of the logging curves. Therefore, it is necessary to eliminate the effect of borehole collapse on logging curves and obtain the logging that could actually reflect the formation, when synthetic seismogram is established. The logging rebuilding technology based on multiple-element regression can improve synthetic seismogram apparently, and it has presented good application results.

Sulige Gas Field is located in the Suligemiao area, northwest of the Ordos Basin, with a prospecting area of about 4×104km2. Owing to the strong heterogeneity in the SQW Block, one of exploration blocks in the Sulige Gas Field, remains reservoir characteristics of the gas field: lithologic gas reservoirs with characteristics of “three low” (low pressure, low permeability and low abundance). The He8 member of the Shihezi formation, the major exploration target, is deposited in braided river environment. The conventional logging data is very useful to indentify different facies and to estimate gas potential. The technology of discrimination with sedimentary facies and gas layers using logging data is established in this paper. We use the technology combining with AVO and other exploration methods to pick out 4 favorable exploration target areas with the success rate of more than 80%.

Abstract

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With the rapid development of national economy, combined with the construction of strategic reservation of petroleum in China, difficulty of large-scale energy storage and peak-shaving comes up. In recent years, the U.S. Department of Energy (DOE), the Bonneville Power Administration (BPA), the Pacific Northwest National Laboratory (PNNL) and a number of energy companies launched two projects in the Columbia Basin to evaluate the technical and economic feasibility of underground gas and wind power storage in basalt interflow aquifers. These projects reveal the potential of volcanic rocks in the underground energy storage areas. This paper briefly describes the new progress of study in underground gas storage (UGS), compressed air energy storage (CAES) and underground thermal energy storage (UTES) of volcanic rocks. We point out that depleted volcanic oil and gas reservoirs could be another complementary type of UGS and CAES, and volcanic rocks types should be included extrusive rocks and pyroclastic rocks. At last, volcanic energy storage technologies used in some domestic related areas of enlightenment is summarized to provide theoretical basis for building green, efficient and low-consumption economy.