Subsurface core hole stratum resistivity measuring probe and measuring method

Abstract

The invention discloses a subsurface core hole stratum resistivity measuring probe and a measuring method, the subsurface core hole stratum resistivity measuring probe comprises an emission electrode,a loop electrode and an insulating framework, the insulating framework is arranged between the emission electrode and the loop electrode, the loop electrode is an annular cylindrical surface electrode, and the emission electrode, the insulating framework and the loop electrode form the subsurface core hole stratum resistivity measuring probe in a cylinder structure. The provided resistivity measuring probe is simple in mechanical structure and is convenient to implement. A provided signal acquisition and transmission system is also feasible, the measuring method provides a set of scheme for measuring the in-situ resistivity of stratum of a subsurface digital core.

Description

technical field [0001] The invention belongs to the technical field of oil well formation parameter measurement, and in particular relates to a downhole core hole formation resistivity measurement probe and a measurement method thereof. Background technique [0002] For complex reservoirs with severe heterogeneity, complex rock mineral composition, diversified reservoir space and low porosity, the traditional logging interpretation theory based on homogeneous and isotropic formations, Methods and techniques face many challenges. Petrophysical experiments are the basis and basis for understanding the physical characteristics of reservoirs and performing logging interpretation and modeling. Traditional petrophysical experiments can no longer meet the needs of exploration and development of heterogeneous and complex oil and gas reservoirs. In traditional petrophysical experiments, the core is taken from the formation to the surface and then tested. The core is separated from t...

AI Technical Summary

Problems solved by technology

Petrophysical experiments are the foundation and basis for understanding the physical characteristics of reservoirs and performing logging interpretation and modeling. Traditional petrophysical experiments can no longer meet the needs of exploration and development of heterogeneous and complex oil and gas reservoirs.

In traditional petrophysical experiments, the core is taken from the formation to the surface and then tested. The core is separated from the formation, the sample volume is small, and the representativeness of the heterogeneous reservoir is poor; the conditions such as temperature, pressure, and stress are simulated by the ground, which cannot reflect the rock under real formation conditions. Physical properties; from drilling and coring to experimentation and application, the period is at least 3 months, and the application lags behind

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