In the middle and late stages of development of Tahe fracture-hole reservoir, the methods to improve oil recovery are based on comprehensive understanding of the structural characteristics of the reservoir. There are many methods to describe reservoir structure: Seismic evaluation, cross-well monitoring and evaluation, production performance or water injection pressure drop and so on. At present, a large number of fracture and hole units in Tahe Oilfield have carried out tracer detection techniques such as water injection and gas injection to analyze oil recovery. A total of 190 well groups of inter-well tracer monitoring have been carried out. Through a large number of cross-well tracer production data, cross-well connectivity has been understood, but the failure to dig the tracer production curve deeply shows the possible reservoir characteristics. Through modular 3D model design and fabrication, the required model structure can be built in three dimensional space. According to the characteristic curve of injecting tracer, the reserves of field fracture-hole reservoir can be correctly evaluated, and the more approach underground fracture-hole structure can be obtained.

The core composition structure of fracture-cavity reservoir is analyzed, including strength, composition, porosity, surface structure and so on.

Build a three-dimensional simulation physical platform framework.

According to the structural characteristics of underground fractures and holes in fracture-hole reservoirs (proportional size, fracture-hole distribution, etc.), core models are used to process three-dimensional modules with different characteristics of fractures and holes.

The three-dimensional module is assembled into three-dimensional models with different characteristics.

With the existing tracer, the injection and collection of tracer are carried out in the model structure, the flow and dispersion of tracer, the interaction between core and different tracers are analyzed.

According to the results of tracer and the structure of the model, the internal relationship between the tracer and the model is established, and the structural characteristics of the model are predicted according to the feedback.

The flow of tracer after injection is simulated and the characteristic curves of tracer are summarized. At the same time, a set of tracer characteristic curves for underground structure analysis of fracture-hole reservoirs is summarized.

Tracer production curves show reservoir characteristics, which have not been studied in the field. The project team deeply understands the working principle and characteristic curve detection technology of tracer. Through modular 3D physical mod design and fabrication, the model structure needed can be built in the 3D space to obtain a closer underground fracture-hole structure. According to the characteristic curve of the tracer injection, the reserve of the field fracture-hole type oil reservoir can be evaluated correctly. The product has breakthrough technologies so the advantages are outstanding.