Development and Field Application of a Drilling Fluid Intelligent Testing and Evaluating System

Real-time testing, cloud store of data, intelligent diagnose and automatic optimization suggestion and the prerequisite for the oil and gas industry to achieve intelligent and digital transformation. To achieve the goal of transformation, a drilling fluid intelligent testing system has been developed on the bases of industrial standards, field operational requirements, and in connection with the internet of things (IoT) and big data platforms. This system can be used to fulltime test drilling fluid parameters automatically and continuously in 24 hours a day in 365 days at temperatures between room temperature and 200 ℃ and at pressures between atmospheric pressure and 8 MPa. Parameters tested include drilling fluid temperature, density, rheology, API and HTHP filter losses and changes in concentrations of various ions in the mud filtrates. Using the intelligent analysis module, the real-time parameters tested can be compared with the corresponding designed parameters, thereby helping present optimized drilling fluid treatment to guarantee the safety of downhole operations. Long-term laboratory test and thousand batches of experimental comparison data obtained from field application of the system on many wells indicated that the rheology measurement module and the filtration measurement module have an accuracy of 97.3%, the ion concentration measurement module has an accuracy of 96.2%. The successful application of the drilling fluid intelligent testing and evaluating system has provided an accurate and stable data guarantee for safe, efficient and intelligent oil and gas exploration.