Solution for Sand Production Problem in Oil and Gas well

Abstract

Sandstone reservoir rock failure due to hydrocarbon extraction and pore pressure reduction can induce phenomenon called sand production. Even though sand production may increase the overall productivity especially in heavy oil, it also may cause other negative impact such as equipment erosion which can lead to loss of integrity that can eventually induce hydrocarbon leakage. Thus, safety factors need to be considered before deciding if sand production can be allowed in the well. Operators must be prepared for any additional cost for special well completion plan if their well is sanding candidate. Therefore, predicting the sand production ahead of field development plan is smarter exercise for better return of investment. Estimating where and when sand production will occur can be achieved by conducting fit for purpose geomechanical modelling for the specific reservoir. Summary of the methodology is discussed in the paper which can help completion engineer to make decision in selecting best completion. Data from a gas field and well are used in this paper adopting the suggested methodology. The results from the study can predict when and where sand production will occur and the level of severity. The study also recommends simple solution to avoid any sand production by optimising perforation phasing and its geometry.