Recommendations for field geophysical research of inflow profile in horizontal wells with multiple hydraulic fracturing

Abstract

Relevance. Correct planning and improving the effectiveness of field geophysical surveys in horizontal wells with multi-stage hydraulic fracturing. Wide distribution of horizontal wells with multi-stage hydraulic fracturing requires development of methods of researching hydraulic fractures in the field of optimization of completion technologies, hydraulic fracturing and field development monitoring. The instrumental methods of researching fluid inflow, which include field geophysical research, under conditions of horizontal wells with multistage fracturing, find out the set of missing, which essentially reduce it reliability. Aim. Improvement of the quality of field logging in horizontal wells with multistage fracturing by developing criteria for application of research technologies. Methods. Analysis of field geophysical data of horizontal wells with hydraulic fractures in PJSC Rosneft Oil Company. Results. The authors have developed an expert decision-making system, which has the form of matrix with criteria of application of field geophysical research methods to horizontal wells with multistage hydraulic fracturing. This matrix enables in dependence on the well parameters (well construction, number and position of hydraulic fracturing ports, well fluid content) and scenario conditions (type of problem to be solved, inflow localization, characteristics of geophysical devices) to estimate the probability of delivery of devices inside the well with different ways, the informative value of field geophysical research, the quality of solution of the problem to be set. During pilot works the matrix was improved by the methods of researching low-rate horizontal wells. The paper also considered the experience of using low-rate wells with a packer flow meter and spectral noise logging.

Keywords

• field geophysical research
• inflow profile
• horizontal wells
• multistage hydraulic fracturing