The next day, they went to the most promising point of b3 for on-site exploration to see if it was possible to drill a well here first.

After arriving at the scene, they realized how difficult it was to b3. Most of this huge granite was buried underground, with only a small part of it exposed. However, the oil marks that penetrated into the ground could be clearly seen from the edge of the exposed stone.

After discovering that oil was seeping out here, Qin Xike directed workers to dig a trench around the stone and obtained two information:

First, the stones are very large in size, and it is extremely difficult to dig out the stones with their engineering strength. Second, there is a certain reserve in this location: about 200 liters of oil seeped out of the trench in one day and night. If it can be officially drilled down, it is conservatively estimated that it can produce 2 to 3 tons per day.

In the spirit of "mosquito meat is also meat", the workers dug a temporary oil storage pool nearby. Half a meter of oil had been deposited in the small pool. Qin Xike picked up a wooden stick and stirred it. He felt that the oil was very light and had a strong pungent smell. He took a little as a sample.

Obviously, it is obviously unrealistic to expect the gunpowder on the Yefeng to explode the stone. This well can only wait for the next wave of supply ships to bring them blasting teams and explosives.

"If there is natural gas, it will be a big deal..." Chen Pengyu said.

"The power doubles - but even if there is natural gas, it is useless to us. We do not have the ability to store gas, so we can only burn it directly for safety reasons."

"Let's look at other possible pitfalls."

They looked at several exploration wells with signs of oil and gas outcropping. Pit A11 only drilled about ten meters and then oil sand appeared, and then drilled five or six meters down and disappeared. Pit A16 also saw traces of oil appear when it was not drilled deep, but it soon disappeared. Although it reached fifty meters in one breath, it still gained nothing and had to give up.

After drilling pit a4 for about twenty meters, water mixed with oil emerged from the sand. At that time, the crowd was excited. However, the oil-water mixture did not last long, and most of the water came out. Qin Xike went to take a look and found that the water did contain oil, but the oil was black silk in the water, which was obviously the result of groundwater rushing through the oil-containing layer. The pit was also abandoned.

However, they did not find anything. A exploration pit drilled a stable oil layer. The first time they obtained an oil well with a yield of more than 1,000 liters a day and night was obtained. This greatly encouraged the exploration team. That night, Cui Yunhong ordered to give each of the personnel of the entire engineering team one dollar. The relevant staff would also receive additional rewards.

Within a few days, the exploration team completed the drilling and measurement of the surveying and mapping well. Qin Xike directed everyone to lower the resistor tool into the well, record the lateral resistivity curve at the fixed point, and then graphically map the recording results with the wellbore depth, and finally form the logging curve of the formation.

Based on the preliminary survey and excavation situation, Qin Xike proposed to Cui Yunhong: Due to the large investment in formal drilling, high risks and strong technical requirements, it is recommended to hold an evaluation meeting before the drilling and oil production of each well is officially started, and then record it in the relevant files.

Cui Yunhong understood his thoughts, and that night, the engineering command center held the first drilling evaluation meeting.

This meeting was actually Qin Xike reported the exploration situation to all veterans, and everyone's "collective decision" on which exploration locations should be made.

Through the preliminary experimental drilling exploration, they have already gained a preliminary understanding of the geological structure, groundwater distribution and possible oil and gas storage areas within 50 meters underground in the two areas of A. They have roughly grasped the distribution of the oil layer.

Combined with the early ground sorting and engineering construction, Qin Xike marked seven formal drilling points on the diagram. Then he explained the specific situation of each point. Then he explained the suggestions: continue drilling on the basis of these seven exploration wells, and complete the supporting diversion channel and oil storage tank. Finally, he gave the expected returns of these seven drilling wells:

"It is expected that two to three drilling wells can meet the commercial oil production standards, with a daily oil production of 1,000 barrels, and some drilling wells may reach 1,000 barrels per day."

"If we really want to produce 10,000 barrels a day, where do we put our oil? There is no oil pool with a reserve of 10,000 barrels at all." Huang Lu asked.

"The oil well can be closed, this is not a problem." Cui Yunhong said,

"Then do it, why do you want to hold a meeting specifically?" Wu Tingwei felt that the meeting was inexplicably done.

"The reputation is not right." Chen Pengyu said, "Do you have any other opinions or questions about this plan?"

The meeting ended soon. The elders at the meeting signed the conclusion document and agreed to drill seven drilling wells. The planned drilling depth is 100 meters, which can be increased to 150 meters according to the specific circumstances.

Shortly after the meeting ended, the meteorologists at the temporary weather station issued a heavy rain alarm. In Silla, heavy rains that occur every day will not be warned, at least the continuous heavy rainfall of more than 20mm per hour will be warned.

At 16:00 p.m., the first drop of rain fell. Then the sparse little raindrops turned into heavy rain. In less than a few minutes, the sky began to pour water down like a hole, as if a water curtain was hung on the earth. Not to mention continuing to work, even walking in the open air was impossible. All the pits and low-lying areas on the construction site were filled with water.

The rain continued until midnight before it became smaller. The entire mining area became a vast ocean, and the camp facilities were damaged in many places, so Chen Pengyu had to notify everyone to stop work.

Two days later, the rain stopped completely. The heavy rain almost destroyed all their previous work. The exploration team had to repair all the steam engines soaked in water first, and then start draining after reigniting.

Chen Pengyu led the rescue team to the mining area to clean the roads and operation points, and renovate the machinery and equipment. All the elders walked around the mining area and looked at the losses in the mining area. Finally, they decided: reduce the construction area of ​​the exploration project area by half, concentrate manpower and material resources to clean up the accumulated water; after restoring the ground facilities, all mechanical drilling forces conducted concentrated drilling of the selected seven operating points.

All seniors took turns to work in the mining area for 24 hours in order to deal with emergencies in a timely manner and supervise the project to carry out the project. This drilling is different from the previous exploration drilling, and a 15-centimeter-diameter sleeve must be used. Both the equipment and personnel requirements must be much higher.

The machinery factory could not make such a large diameter pressure-resistant seamless pipe, so the sleeve was based on the experience of the Yanchang Oilfield in the old time and space. At that time, the mining department of Yanchang Oilfield did not have a casing, and used the body tube of the seized Japanese large-caliber artillery. The machinery factory did the same thing, and according to the manufacturing process of the artillery body tube, the body tube was first cast with cooked iron, and then drilled the hole in the center after hammering to create a "cannon barrel".

Early the next morning, each drilling group entered the operation surface, and the command center notified the timber factory and the machinery maintenance station to enter a 24-hour waiting state. The command center moved to the shed built next to the main passage. This operation included seven drilling wells: Wells 1 to 7. At 3 pm that day, drilling officially began. Since there were only four steam engines, two were used to drive drilling rigs and two were used to drive mud pumps, only Wells 1 and Wells 2 were started at the same time.

Qin Xike organized a patrol emergency team to inspect various operation points and promptly report any unsuccessful drilling situation to the command center.

When the drilling started, everything was normal and everything was going smoothly, but on the morning of the next day, a driller came to report that there was an emergency in Well No. 2.

"What? The pressure is too great? I can't drill. Please make it clearer." An emergency team member came to report to Qin Xike.

However, the workers' reports were unclear. Qin Xike listened and felt that the situation was a bit urgent, so he sent someone to find Cui Yunhong. Several people went to the No. 2 drilling platform together.

It turned out that when the drilling reached forty meters, it entered the gas layer. Natural gas with huge pressure surged upwards in the drill rod against the mud column, and the entire operation surface became a mud pond. The mud pump could not stop so it could not be connected to the drill rod. For two hours, the drilling not only did not drill 1 cm forward, but the drill bit retreated more than half a meter due to the gushing out mud.

"Upback pressure valve!" Qin Xike immediately asked to add a back pressure valve in front of the drill bit, "Hurry up! Otherwise it will be in vain!"

The machinery industry port had never produced such equipment, but as a common oil well equipment, Qin Xike specially communicated with Zhan Wuya and organized the production part. The main structure of this thing is two disks, a 5-cm round hole is opened in the middle of the large disk, and the diameter of the small disk is larger than the hole of the large disk. The two disks are combined with hinges and are installed on the bottom drill pipe joint. When the mud flows from top to bottom to the bottom, the small disk opens the channel downward; when the pump is stopped, the small disk covers the hole of the large disk, and the mud at the bottom of the shaft will not surge up by the bottom of the shaft. Due to the use of a back pressure valve, the No. 2 drilling platform successfully drilled through the gas layer. It drilled nine meters in the next six hours.

The appearance of natural gas layers proves that they are very close to the oil layer - this is an exciting signal.

The third day after the drilling began, the No. 2 drilling platform had exceeded the planned drilling depth of 100 meters. When Chen Pengyu came to the drilling platform for inspection at 5 a.m., he found that the mud pump was running easily and the turntable became flexible. He knew that satisfactory results would soon be achieved.

Sure enough, at 9 o'clock in the morning, the driller reported that crude oil began to appear in the mud trough, and gradually the amount of oil was reversed. The workers cleared out the drainage trough according to the prior training and introduced the crude oil into the measurement pool. At noon, Chen Pengyu sent someone to Qin Xike, who was on duty in the living area, and asked him and Cui Yunhong to go to the drilling platform to discuss the next countermeasures.


Chapter completed!