Meetings

Lately, exploration experiments on the oil fields and research of the isolated core from deposits of the Bazhenov formation allowed receiving new information about reservoirs of these strata. On the example of a several fields, located in the Latitudinal Ob’ area in Western Siberia, it was given common regularities of the Bazhenov formation and variability of the reservoirs.

A Schlumberger’s approach for Bazhenov sweet-spot forecast will be discussed taking as a case study one of integrated project of processing and interpretation of seismic, well log, core, PLT, tests and production data.

The recent years have witnessed the explosion of number of horizontal wells that are being drilled around the world. Drilling of horizontal wells presents challenges not only for operators, but also for well planners. The framework of questions to be addressed include “What are the present challenges associated with drilling horizontal wells?” and “What are the advancements in technologies needed to meet the challenges?” Although several challenges are inherently present, the presentation will particularly ponder the following primary drilling challenges: Drillstring integrity, Hydraulics management, Wellbore integrity and Well placement.

Effective hydraulic fracture stimulation is critical for shale development, and microseismic is the only technology able to map the growth of these hydraulic fracture networks. Since the advent of commercial mapping in the Barnett Shale in 2000, microseismic has been used to investigate hydraulic fracture treatments around the globe.

One of the main aspects in the field management consists in the maintenance of reservoir pressure. Solid comprehension of injection influence on the reservoir is obligatory for that. In the complex carbonate geological environment (karst, fractures, caverns, etc…) this task starts to be even more complicated. Flow and pressure path could be not obvious and pressure support could be expanded on the large areas on distances more than 0,5 km.

Production of oil from organic shale reservoirs is a function of porosity, hydrocarbon saturation, pore pressure, matrix permeability, and hydraulic fracture surface area plus fracture conductivity. Hydraulic fracture surface area, porosity, saturations and pore pressure dominate initial production rates. Matrix permeability becomes increasingly important in sustaining production later in time.

Purpose of the presentation is to discuss the meaningfulness of the API crush test to evaluate proppant quality and, ultimately, to qualify or disqualify a proppant. We will ask if the API crush test can be used as a tool to forecast production rates or if there is a correlation between conductivity and API crush test results.

The report presents the OAO "LUKOIL" experience in development and implementation of the uniform system of planning, acceptance, documenting, quality control of the performed works and reliability of interpretation results, creation of databases of flow tests and tracking surveys.

Sakhalin Energy has selected a non-conventional cutting-edge completion approach to maximize recovery of the Lunskoye and Piltun-Astokhskoye fields. The original Piltun-Astokhskoe field development strategy included multiple oil zone commingled single completions and smart water injectors. Smart injectors allow selectively inject into up to four separate zones through a single 140 mm (5.5”) completion string. Every zone is isolated with a packer, has a surface-controlled downhole flow-control valve and a pressure-temperature gauge.

When injecting smart water with a different ion composition than the initial formation water, it is possible to modify the wetting condition of the reservoir in a favorable way, which can have dramatic effects on oil recovery, especially in carbonates.