You’re drilling in unconventional formations. How can you improve your drilling efficiency?

Detailed formation studies, considering both confined(CCS) and unconfined compressive stresses (UCS), hardness, and roughness, are the key to successful bit selection. Detailed geological and geomechanic information enable to specific design. Unconventional reservoir, by definition, contains multiple factors that affect the best selection of bit in terms of technical performance and economy.

A good study and analysis of formation lithology, mud design and of course bit selection. Experienced driller with good down hole knowledge is always a plus along with reliable rig

The bit selection is one of the crucial planning decisions that influence greatly on the drilling performance. The formation compressive strength, lithology, bedding plane, and offset wells performance should be studied very well during the planning stage. The bit type, design, and TFA will add great value to the drilling performance if selected properly.

Selecting the optimum bit design should take into account contextual information such as trajectory and BHA design, in addition to geological and geomechanical data. A different bit design may yield the best results while drilling identical formations in close offset wells where one well is drilled vertically with a packed motor assembly, while its nearest offset drilled a curve (building inclination from vertical to horizontal) using an RSS assembly. Bits designed for directional work often include features such as depth of cut control and tapered gauges.

The bit is one of the important tools for oil drilling. Whether the bit adapts to the rock property and its quality plays a very important role in the selection of drilling technology, especially in the aspects of drilling quality, drilling speed and drilling cost.?PDC bit?is a rock breaking tool widely used in the oil and gas exploration and development industry today which effectively improves the mechanical drilling tools and shortens the drilling cycle. Because of the excellent cutting performance of?diamond drill bits rock, the diamond bit can drill at high speed and enlarge the drilling depth to a certain extent when being selected as oil drilling tool.

Foam-based drilling is very useful in high-temperature conditions. It has the best characteristics, like air and mud drilling. Useful in geothermal wells.

The formation studies by taking samples by the geologist is the most important and it's the main thing before drilling any formation and its will specify the drill bit type that will use to drill formation and the type of drilling fluid and also the data from another rig sites that drilling before in the nigherbood location.

For sure, this helps a lot. Real time information from the well helps to understand how is the well, what king of formation it is and what zone it is, what to expect and take care of the well. knowing the formation we can know if our mud weight is ok or will need to increase it or decrease it, this to mitigate losses by ECD or add some chemicals to re-conditionated the mud. we can use LWD and mud logging system, matching these and understanding drilling operation conditions, will help to perform efficiency.

One thing I’ve found usefully is realtime monitoring and analysis of drillstring behaviors through hookload Broomstick realtime analysis. Helps in identifying a safe drillers roadmap across different challenging formations The realtime plot enables users to rapidly identify potential hole problems and poor hole cleaning while drilling or tripping. As a result, drillers gain valuable real-time insight that allows them to avoid buckling and optimize ROP and trip times.

Real time data is very useful these days and any expert or data analyst can monitor the well through this. He may help to identifies the upcoming problem with the help of seen different parameters while drilling a well.

drilling fluid density and properties like PV, YP and VP..., monitoring is veryimportant in unconventional formation that having narrow window between pore pressure and fracture pressure, any slight increase in Solids or YP can fracture formation also need to monitor mud ability to increase cutting transportation ratio to prevent cutting to be overloaded in annulus.

- Formation Evaluation: Conduct a thorough evaluation of the formation properties, including rock strength, pore pressure, and mechanical properties. This information helps in designing drilling fluid systems tailored to the specific challenges of the formation, preventing instability issues. - Mud Weight Management: Optimize the mud weight (density) to achieve a balance between preventing fluid influx and avoiding excessive pressure that can induce fractures or fluid losses. Mud weight should be carefully selected to maintain wellbore integrity while minimizing the risk of wellbore instability.

Hole cleaning monitoring with real time software like PRESSPRO RT is really help full in stuck pipe prevention to have better reaction time.

Improving drilling efficiency in unconventional formations relies heavily on optimizing drilling fluids. Drilling in unconventional formations poses unique challenges due to varying geological conditions, high temperatures, and pressures. To enhance efficiency in this context, comprehensive strategies focusing on drilling fluid selection.Implementing these strategies collectively optimizes drilling fluid performance, improving efficiency, reducing operational risks, and increasing success rates in unconventional formations. This holistic approach balances technical aspects, environmental concerns, and personnel expertise, ensuring more effective drilling operations.

You have to be very careful with the mud rheologies and weight, running mud checks constantly, and stay in touch with drilling crew for any change you see. Foam fluids are sometimes good to be use in this projects.

The reason of going from a conventional to unconventional drilling technology is to reach the desired formation and get the optimized output. Drilling only depends on 3 critical factors - the bit, the mud and the formation stability. Everything else is supporting these 3 things. Whether it’s well data, pre data or while drilling or post drilling. Formation stability is very important when dealing with unconventional technologies and this is to ensure our drilling column exerted pressure is optimal so it does not lead to blow out or formation loss. No matter what technology we use, a proper plan using the received drilling data via geology team is crucial. Incorrect data will lead to loss of time and revenue.

Buenos días... A modo complementario les comento que aparte de reconocer las increíbles aptitudes, conocimientos y aplicación de mejores prácticas en perforación de pozos, también se debe tomar en cuenta a los especialistas en geología, estratigrafia, micropaleontologia, quienes son los que determinan que tipo de estrato, su edad geológica, su medio ambiente de deposición y su posible prospectividad, para así contribuir al éxito de los Proyectos exploratorios. Saludos.

A good mud engineer can make or break the well. Without a good understanding of the well bore it can be a job well done or a cement job.

El análisis de predición de estabilidad del pozo está conectado con la creación presisa del modelo geomecánico, esto implica que la data utilizada para crear el modelo debe tener una alta fiabilidad. Con ello se asegurará la disminución de los problemas asociados a la estabilidad del pozo y los NPT.

Realtime Geomechanics has proven time after time to help in determining the optimum mudweight window specially through utilization of Sonic LWD technology .

Best HSI Best MSE Optimum mud weight. Suitable Bit based on formation and lithology. Using down hole motor if there is torque limitation and RPM limitation.

One thing I found helpful in drilling through unconventional formations is the drilling practices. The shoe to shoe drilling strategy keeping the maximum expected mud weight will result in avoiding formation time dependency factor and break outs.

Proper Drill Well on paper (DWOP)is key to success of any unconventional drilling application , through proper well analysis and risk identification and mitigation only then a proper drilling road map can be paved for tackling any obstacles along the way . BHA design and selecting the optimum directional tool to fit for purpose for your application along with designing a wellplan with minimum risk to your wellbore are the bases of any successful unconventional application .

Todas as quest?es anteriores s?o fundamentais na perfura??o de um po?o n?o convencional, é o conjunto de estudos e técnicas abordados que nos permitem o melhor planejamento, mas é fundamental durante a realiza??o “ouvir” o que o po?o nos diz e, de acordo que este conhecimento prévio, tomarmos as medidas adequadas à situa??o fora do esperado que surgir, pois numa perfura??o n?o convencional elas sempre surgem. A nossa prepara??o, a nossa prontid?o de resposta, a nossa aten??o ao que o po?o nos diz é o que permitirá a melhor resposta a qualquer evento que surja.

Managed pressure while drilling (MPD) techniques can offer advantages in unconventional formations. These techniques help control the wellbore pressure, improve drilling efficiency, and minimize drilling problems related to formation fluid influx.