Oil & Gas Exploration & Production
Exploration
●3D seismic acquisition design based on geological
●model Reverse time migration (RTM)
●SDELoil shale characterization and geophysical evaluation
●Complicated reservoir subtle interpretation
●Complicated trap exploration evaluation
●LWD (logging while drilling) and NMR (nuclear magnetic resonance) logging technology
Development and Production
Based on overseas reservoir types, development characteristics and technical requirements, domestic and foreign mature technologies are introduced to create supporting technologies that are“ advanced, economic, practical, system integrated and scalable”
●Oil sand development technique
●Deepwater development technique
●CBM development technique
●Reservoir description technology
Oil Drilling & Production Technology
●Efficient wellbore-lifting Incorporated technology
●Reservoir protection technology in whole process
●Water shutoff and profile modification in Water flooded reservoir
Surface facilities technology
●Complex surface facilities construction Incorporated technology in Onshore
●Marine engineering technology in oil and gas fields in offshore
Special Oil & Gas Reservoir Development Incorporated Technology
●Deep and fractured bedrock Carbonate-rock heavy oil reservoirs development Incorporated technology
●Horizontal well efficient Incorporated technology in gas cap,bottom water and thin oil ring reservoirs
●Oil sands development Incorporated technology
●Coal Mine Gas development Incorporated technology
●Gas condensate reservoir development Incorporated technology
OIL & GAS FIELD DEVELOPMENT
A hydrocarbon field has a long life cycle:
From the discovery of a petroleum deposit to the first oil/gas, exploration and production activities are spread over several decades. Five main steps can be distinguished in the life of an oil or gas field:
EXPLORATION AND EVALUATION
1 | Field discovery
> oil and gas are trapped in reservoir rocks buried underground (on shore/ off shore),
> to locate hydrocarbon accumulation, Boost’s geoscientists analyze images of the earth’s subsurface produced by seismic echography. They build a model of geological layering of the subsurface, and then identify potential reservoirs called «prospects»,
> exploration wells need to be drilled to check if the identified prospect does indeed contain hydrocarbons. These wells are typically several kilometers deep.
2 | Field evaluation
Once discovery has been confirmed, 3D numerical reservoir simulation models are built:
> to estimate the initial volume of oil and gas in the reservoir,
> to simulate the reservoir fluid flow behavior and optimize the field development scenario (number, type and location of wells, level of field production, etc…).
Appraisal wells are drilled to improve the field description through further data acquisition.
An economic assessment is performed taking into account revenue according to production forecasts and the estimated development costs.
If the required economic criteria are met, the field is developed and then produced.
OIL & GAS PRODUCTION
3 | Field development
A field development plan establishes the following:
> the number of wells to be drilled to reach production objectives,
> the recovery techniques to be used to extract the fluids within the reservoir,
> the type and cost of installations, such as platforms, depending on the marine environment (tides, storms, waves, winds, corrosion, …),
> the separation systems for gas and fluids,
> the treatment systems needed to preserve the environment.
Rotary drilling is the most widespread drilling technique and has been constantly upgraded: deviated wells, horizontal wells and, more recently, multi- drain wells. Those new technologies allow to mitigate the surface foot print of the project and to increase well productivity.
4 | Field production
The time period over which hydrocarbons may be extracted varies between 15 to 30 years and may be extended up to 50 years or more for «giant fields».
The lifetime of a reservoir is composed of different successive phases:
> a period of production increase,
> a stabilization phase or «plateau»,
> injection phases (water, gas or chemical products) to «assist» the hydrocarbon recovery and thus maintain a satisfactory volume of produced resources,
> the depletion period when hydrocarbon production declines progressively.
Deep offshore
Significant technological developments have been recently made in exploration and production deep offshore (more than 1000 m water depth). Many wells have already been drilled in this range of depth but producing deep offshore fields remains particularly complex and expensive and still represents, today, a technological challenge.
5 | Field abandonment
When the hydrocarbon production rate becomes non economical, the reservoir is abandoned.
Before abandoning the field, Boost:
> dismantles facilities such as platforms,
> puts the well in a safe state,
> preserves the field’s residual hydrocarbon reserves of the field,
> cleans, depollutes and rehabilitates the site.