34results about How to "Improve the success rate of exploration" patented technology

The invention provides an earthquake prediction method for petroleum-rich layer sections. The method comprises the steps that sensitive attributes with good recognition capability to the petroleum-rich layer sections are acquired through single well and connected well attribute analysis; the sensitive attributes are subjected to attribute fusion, and a fusion attribute capable of better reflecting a petroleum layer is acquired; the fusion attribute under different time windows of a layered section is compared with the thickness of the petroleum layer of each well, and the distinguishable formation thickness of each layer section is acquired; forward modeling is carried out on petroleum layer parameters of each layer section, and the threshold value of the petroleum layer parameters of each layer section is acquired; the distinguishable formation thickness of each layer section and the threshold value of the petroleum layer parameters of each layer section are combined, and all the petroleum-rich layer sections are determined; the fusion attribute and the petroleum layer parameters of each layer section are joined, and a detecting attribute response relationship gauge of petroleum layer sets of each layer section is acquired; the relationship gauges are utilized for detecting all the layer sections, and distribution of the petroleum-rich layer sections on the profile and plane is acquired.

The invention discloses a pressure coefficient prediction method and system of a marine mud shale formation. The pressure coefficient prediction method of a marine mud shale formation includes the steps: preparing the drilling data, the logging data and the seismic data; for an overpressure shale formation, selecting a sensitive logging curve, and acquiring the longitudinal wave speed and the transverse wave speed; based on the drilling data, analyzing the relation between drilling density and the longitudinal wave speed, acquiring a Gardner formula, optimizing a Fillippone formula, obtainingan optimized Fillippone formula, and performing fitting on the coefficients in the optimized Fillippone formula; based on the transverse wave speed, performing re-optimization on the optimized Fillippone formula, obtaining a re-optimized Fillippone formula, and performing fitting on the coefficients in the re-optimized Fillippone formula; and based on the re-optimized Fillippone formula, predicting the formation pressure coefficient. The pressure coefficient prediction method of a marine mud shale formation performs quantitative evaluation research on the shale gas preservation conditions, cancomplete and deepen the shale gas dessert prediction technique sequence, and can realize optimization of the shale gas high-yield enrichment region.

The invention provides a reservoir prediction method under guidance of a phase control rock physical model. The reservoir prediction method under guidance of a phase control rock physical model includes the steps: dividing sedimentary facies; obtaining difference of the main mineral components of the reservoir in each sedimentary facies; preliminarily determining the rock physical modeling parameter in each sedimentary facies; establishing a preliminary rock physical model for the reservoir in each sedimentary facies; obtaining difference between the analog data and the measured data, and if the difference is greater than the preset error allowable value, adjusting the modeling parameter and reestablishing the final rock physical model until obtaining the rock physical model in each sedimentary facies; determining two elastic parameters which are most sensitive to changes of characteristic minerals; obtaining the relation curve of the two elastic parameters through calculation; obtaining distribution of the two elastic parameters of the whole three-dimensional earthquake region; and dividing distribution of the two elastic parameters of the whole three-dimensional earthquake region into a reservoir and a non-reservoir, and obtaining reservoir distribution of the whole three-dimensional earthquake region. The reservoir prediction method under guidance of a phase control rock physical model can improve the accuracy of reservoir prediction under complicated geological conditions.

The invention provides a method for identifying the seismic characteristics of a mud-coated sand type thin reservoir. The steps are as follows: obtaining the seismic wavelet of the target layer; calculating the apparent main period PAM; calculating the mudstone velocity Vm and the sandstone velocity Vs of the target layer; Whether the sandstone of the target layer is concentrated in half of the apparent main period; calculate the thickness range of the resonance strengthening area and the resonance weakening area; build a mud-coated sand geological model with gradually increasing sandstone thickness; divide the target layer into mudstone area, resonance strengthening area and Resonance weakening area; the model synthetic seismic record is obtained under the condition of given rake wavelet, and the reflection range of the resonance area is marked; compared with the geological model of mud-coated sand, the seismic waveform in the resonance area is divided into types, and different types of seismic waveforms and Relationship between amplitude and sand body development. The invention can better interpret the information on the mud-covered sand type seismic profile, is beneficial to use the information on the seismic profile to help interpretation, is favorable for the development of sand bodies, and reduces the exploration risk.