Isotope staged fracturing tracer technology

Abstract

The invention discloses an isotope staged fracturing tracer technology which comprises the following construction steps: S1, construction design: formulating a test implementation scheme, selecting the type of a required isotope tracer agent, and determining the type of the isotope tracer agent according to data such as well spacing, reservoir thickness, porosity, moisture content, connectivity coefficient and instrument of a well group, minimum detection limit and the like; the dosage of the used isotopic tracer agent is calculated according to the following steps and formulas: firstly, the maximum dilution volume Vp=A*H*Sw*Eta injected into a stratum is calculated, and secondly, the dosage Q=mu*MDL*Vp of the tracer agent is calculated; and S2, on-site construction: during fracturing construction, a tracer agent can be added from a fracturing blender truck. According to the isotope staged fracturing tracing technology, the effect of the fracturing fluid on the stratum can be qualitatively and quantitatively analyzed through the isotope staged fracturing tracing technology, and the flowback effect and the fracturing measure effect of the fracturing fluid in each stage in the volume fracturing process are indirectly reflected by monitoring the concentration of each tracer agent in the fracturing flowback fluid in each period.

Description

technical field [0001] The invention relates to the field of fracturing monitoring, in particular to an isotope staged fracturing tracing technology. Background technique [0002] Due to the extremely low porosity and permeability of tight oil reservoirs, tight oil reservoirs are often developed by combining horizontal well drilling and volume fracturing. After volume fracturing, a complex fracture network is formed, which can increase the seepage volume and increase the controlled reserves of a single well. The characterization of fracturing has always been a key issue in the development of tight oil and even the entire unconventional oil and gas reservoirs, which determines the evaluation of fracturing effects and the accuracy of production performance prediction. At present, the commonly used fracturing monitoring methods mainly include production dynamic analysis, microseismic monitoring, and fracturing fluid flowback analysis. The analysis of production performance an...

AI Technical Summary

Problems solved by technology

The analysis of production performance and fracturing fluid flowback is to simplify the complex fracturing fracture network into a regular fracture network for production prediction, and the accuracy of the results is low

Microseismic monitoring has the disadvantages of low signal-to-noise ratio, high cost, and poor reliability. Not every well and every layer is operated, and it is impossible to evaluate the fracture network participating in the flow.